Assuming the following:
Cost to buy: $500
Cost to charge $0.40/day (maybe generous)
Cost to Rent: $2/day
Rental Mileage: $0.15/min
Assume 10mph average, (10 miles/day) $9/day
Total: $11/day to rent
2x/week,50 weeks
100 days (200 rides):
Buy: $540
Rent: $1100
No way it’s economical to rent scooters routinely. Even if you break your scooter every 6 months, you can still save by buying a new one.
And who wants to ride scooters you know are abused? Heck, I rode one and the brakes didn’t work.
But that only works if scooters are ubiquitous enough that you can find one when you want one.
If I have to walk 5-10 min to the nearest car which I can unlock from my phone and then use to drive 5 miles somewhere then it's great, but if I have to walk 5-10 minutes to the nearest scooter pickup so I can scooter somewhere for 5-10 minutes then it sort of defeats the whole point.
As you said, if it's much longer than that, then there's no point -- I don't think I'd want to ride a scooter more than a mile or so anyway, so if it takes me 10 minutes to find one, I may as well just walk the whole way.
If it's getting later in the day most of the scooters you find are going to be scattered in all sorts of very strange areas, many times in gated apartments, and/or with not enough charge to get you home. Or maybe you have to settle for that scooter with the screen dangling out of it by the wires and the handlebars at 45* relative to the wheel that everyone else was just not desperate enough to use.
This is certainly true for the hire bikes in London (scooters don't seem to have gotten permission for many areas yet).
One of the biggest detractors is that you could ride a scooter to work and when you go to leave, realize the nearest scooter is half a mile away.
Bicycles in big cities are too inflexible. If all you want is to commute like a sheep from home to work and back to home every day then a bicyle is a great inexpensive and green choice, in every other case it's a problem. Unless of course you are in a small village, where a possible change of plans will still result in a short ride. In London this is not possible. If I was to meet friends spontaneously outside my daily commute area then it would be impossible with a bicycle.
The smallest folding bicycles (e.g. Brompton) are fine, but scooters must either be balanced upright, exposing dirty wheels, or take up a lot of floor space. No thanks!
In the largest cities like London, if my plans changed I'd just leave the bicycle at work, and take public transport to the party, home, and to work the next day (unless my way home passes work, then I can collect the bicycle).
It doesn't matter how slow you pedal, in the American Southeast, just being outside in the summer makes you sweat. A lot of places in this area don't have offices with showers in them. A scooter let me spend time outside without having to end up being a mess.
I enjoyed biking in Austin, but as you can imagine the intense heat a good portion of the year meant a full outfit change and shower after every ride just to start the day.
Also they have less of a learning curve compared to biking on roads, and are easier to maintain, IMO.
Me and my friends accidentally ended up testing that theory in LA. We were going to koreatown from Santa Monica and had about 10 miles left. Half of us decided to use limebikes, another half ended up taking uber. The people on limebikes arrived at about the same time, despite the whole scooter group having to stop every 30-40 minutes and search for another scooter, since in a group of 5 people riding those, there would inevitable be one that is running out of charge in that time interval.
Safety wise, I'd say they are about even. Cars aren't going to value your life either way.
I think the relative efficiency of the share model needs to be weighed against the inefficiency of everyone owning their own while only using it a fraction of the time.
I think that objectively a bike is a much better option for longer trips like this. Both in terms of efficiency and safety. I'd be VERY surprised if on a per mile basis, scooters weren't much more dangerous than bikes.
However, scooters FEEL safer for non-regular bike riders because you are closer to the ground, the helmet feels more optional (though it should not be) and riding on the sidewalk, where you are away from cars, feels like more of an option on a scooter than on a bike (although again, it shouldn't be).
I'd certainly advise a bike if the route is at all flat, and an e-bike if it isn't, but I can understand why that seems like a less appealing choice to some.
I'm confident that, regardless of "feeling", bicycles are the better option for pretty much all tourists/novices who can ride one. It's much, much more stable at all speeds. Scooter riders wobble when starting off, wobble when going at a reasonable speed, wobble when stopping and struggle with turn signals.
On the other hand, even very young children on unpowered kick scooters tend to have pretty good control.
A scooter just seems dangerous on the roads and even trails around here -- there are many ruts and potholes that will swallow a 4" scooter wheel and bring you to an abrupt stop.
Riding a scooter doesn't even avoid the need to wear a helmet (assuming that protecting your brain is important to you). Many people wrongly assume that the helmet is to protect you if a car hits you, but really it's there to protect you when your head hits the pavement for any fall -- there's a very low speed range where a helmet is any protection in a collision but even a simple fall can result in serious head injury without a helmet if your head hits the pavement.
Intercity bus routes only run M-F, so to go 10 miles downtown I have to get the whole way by myself. I can bike, but even if I were in better shape I would still be quite sweaty and exhausted by the time I make that trip. My scooter gets me the distance in an hour comfortably and I don't feel like I need to change after I arrive.
You would think making a long trip like this and standing up for an hour would be a pretty terrible experience, but I've been quite comfortable with it as well as 3 mile trips to the office when required, etc.
My wife is seriously considering a scooter (Even a non-electrified one) for her commute (2-3 days a week, 5 miles) - and I can't see a world where we'd rent one on the daily, as opposed to owning.
My uninformed guess is:
A problem with the rental model is the colossal inefficiency of having to pay people with cars and vans to drive around, and collect + charge scooters at the end of the day. This is a huge waste of resources and human time. Even with VCs p------ a firehose of money into the market, most of it ends up going to drivers, rather than customers.