Do you really believe it's easier/cheaper to retool the gas infrastructure for hydrogen than adding more chargers? All house have electric plugs (enough to charge overnight) and parking lots and most sidewalks too (cf https://thedriven.io/2020/03/24/siemens-converts-all-lamp-po...). Most EV don't need to be charged more than once a week, too.
Edit: Where I lived in Germany, most parking lamps are at the house-side of the sidewalk. Can't run charging cables across the sidewalk everywhere. Trip hazard.
Most people in cities don't use their cars much either. Tesla is already building super chargers in cities. If you only drive in cities and you really only park at spot where there is no charging, and you can't charge at work. You can just go charging at a super charger once a week or so.
To suggest hydrogen is a better option because of this very limited single concern, public parking in cities, is crazy in my opinion. Also the city could let a company do it as long as they get part of the money, and in fact this is already what many companies are doing.
And yes, the infrastructure roll out will be extensive and take time, but it can happen slowly over time as electric car adoption expands.
I see a future where autonomous EVs will drive themselves to charging stations, often in the middle of the night. Tesla will get there first.
If you have to drive to a dedicated spot to do all your charging, all the time, >30 min for charging is /long/. Filling up a car is what, 5 min? And it lasts longer. Don't see this scaling, and people will not like it.
How much power can you realistically get to an European inner-city parking garage without major infrastructure changes? Comparing the timeline for all-electric to the timeline of major construction projects in Germany, I'm not optimistic....
I think we need a "fluid"-refillable e-car. Hydrogen is an option, or maybe build a battery with a replaceable fluid as the energy store. But we might be in a trap: Right now, battery cars are clearly better -- better availability, range, price, choice. And now, charging is not a big problem in most areas, with dedicated spots for charging, it is sometimes easier to park than a gas car! But at some point, these spots will be saturated, and I don't see the capacity ramp up fast up with demand. (Same for green energy production, at least in Germany, without nuclear as an option). Part of that is "not in my neighborhood" initiatives against ugly charging ports running along every street, against construction for more cables, transformer stations etc.
So we could end up with many battery cars and a charging infrastructure which doesn't scale fast enough, and no hydrogen cars, where we could retool the gas infrastructure for filling up and scale quickly.
Hydrogen has the advantage that it is rather cheap and efficient to transport it over large distances. You could do hydrogen production in Africa, for example, and ship it to Europe. Even less danger than oil-tankers. A ship accident is either a big fire, or nothing. No large oil spill. Production could be local to power/far away from people, so social acceptance is better. In-car storage and safe filling up seems to be the problem.