The charging network is improving all the time. The question is what the rates will do if EVs are widely adopted. My guess - rise to take up the slack in lost fuel tax.
Re: the maintenance - I have been wondering this myself. Looking at the established brands of ICE vehicles I see poor to non existent training and upgrading in any vehicle systems. The bare bones basics are covered - stuff I learned at 10 years old - oil changes, tire inflation, etc.
Computer diagnostics - might as well ask the dealerships about quantum physics, the answer will be the same.
As EVs, hybrids, etc have a LOT of computing power, it remains to be seen what will happen when they fail - and they WILL fail.
Send the control modules back to China for repair ? Doubt it.
My guess - tell the customer "You need a new one" - translation - we do not have a clue how to diagnose let alone repair the unit and will shoot it with the parts cannon until it works properly.
Was helping a guy recently - Honda CR-V - drivers window stuck down. Hondas solution - replace everything, motor, the window regulator, the tracks !!!
Came to me, I replaced the switch !
This is where all new vehicles are headed, and EVs will be more of the same