My bet is that maybe in the future we will need 10% of the fuel stations for electric, to keep up with demand. For me 99% or charging is done at home, for most others (who have a drive or a charge point) it might not be as much as that, but still well over 90% I think.
9/10 petrol stations might go broke, as they won't be delivering fuel, National Grid will be instead, on peoples doorsteps. Some service stations may not end up even selling petrol as it will effectively become pointless to sell it for a small market. 10 garages competing for 10% of the users won't work. Diesel will still be there, for the wagons etc, as that will take longer to transition (but it will cost a fortune).
The whatever percentage that don't have drives will end up charging at supermarkets, shops, restaurants etc, until there's a "home" solution for terraced houses. I think this will just end up being small charging posts though, maybe at 22kW or something that doesn't need to be all that fast.