I have my share of electric battery-powered lawn equipment, but I've already gone through one generation of batteries which rendered the old equipment obsolete. And the markup on batteries is on the order of 500% compared to what a generic battery of similar chemistry would cost. It's an excellent racket, very profitable.
I wonder about the people here on HN buying Ryobi stuff... maybe they're onto something. Normally I wouldn't touch Ryobi with a ten foot pole, because it's trash. But OTOH, it's cheap, so maybe the quality of the tool will match up with the expected availability of batteries so the TCO isn't as offensive.
[0] If you haven't seen those old videos where B&S demonstrates why the Slick 50 demos were BS, you should. Lawnmower engines are way overbuilt, mostly as an artifact of their small size. They're hard to kill.
It's bad when you're looking at some piece of equipment and are relieved to discover that it has been sitting with gas in it since the 90s. At least there is a hope the rubber bits are intact.
On the other hand, this is so common now that the aftermarket carb business has become a mass market. You can buy chinese knockoffs carbs with all of the hoses and plastic bits for like $10 on Amazon now.
Aftermarket carbs are cheap because carbs are cheap. You can buy a lawn mower at WalMart for $100, and everyone has to make a profit. That means the engine can't cost more than $20, and the carb must be less than that. The Chinese make a nice profit selling new carbs for $10, even though most carbs still go to the engine manufactures who pay a lot less in quantity.
Ethanol has been common enough in gas since the 90s.In the early years there were problems with it attacking rubber. That rubber hasn't been used in fuel systems for years though.
I went pure electric 5 years ago with no problems. Starts up every time with the push of a button and since I bought a set, it came with multiple batteries so I can swap them out before fully depleting one for extended life.