I agree with some of your points but think you've missed something< text removed>...
First regarding charging. There are some 6000 IC fuel stations in the uk now, well down from what it was at one time. There are now over 36,000 public charging points with over 61,000 connectors in over 21,900 locations, huge coverage.
Admittedfly not evenly distributed, but that isn't as important as the doubters imagine. What matters is that almost all who have bought an e-car have a home charging point, that being well over half a million points additional to the public ones. That means that unlike ic cars, they can always leave home with a full"tank". Since most of them sold today have a circa 200 mile range and the average UK driver covers just 7300 miles a year, 20 miles a day, they don't need lots of public points in their area. And on the rare occasion when they do need one on a long trip, theres bound to be many ultra fast ones well within 200 miles of them!!
Second regarding maintenance. The e-side needs no attention, being like the old milk floats unfailingly reliable year after year. The rest is just an ordinary car, except not wearing the brakes out since the motor does most of the braking by regeneration. So any competent existing dealer is all one needs.
No chance for them to succeed. As we get ever closer to the 2050 deadline to achieve carbon neutral the government will act ever more decisively against the existing ic cars with compulsory scrappage schemes and other restraints.
The other problem will be that as IC cars wear out or crash so disappearing over a 20 year average life period, their fuel stations will too. The sheer inconvenience of that will make ic car use increasingly annoying, back to the earliest days of the ic car when their drivers went to the chemist to buy a can of petrol!!
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Charging. I know 2 people who are waiting for their first EV (Tessla) to be delivered. One lives in a rental property and can't/won't fit a charger, the other has been waiting months to have a charger installed (due to problems within the supply company). Anecdotal a friend works at a company where 4 of the directors have EV's, only 1 has a charge point at home. They have 2 charge points in the works carpark and the directors say that in't convenient. I disagree that most people who buy an EV have a charger at home.
Maintenance. Modern EV's are very complex and cannot be compared to old milk floats ! The old milk floats had simple car-type lead batteries, an electric motor, and the electronics were little more than an on/off accelerator.
I'd agree the government schemes will continue to make EV's attractive while penalising IC. The 2 people I know who are waiting for Tesslas only bought because it allows them to remove funds from their business without paying tax. One is selling a car she bought last year that she expected to keep for 10+ years. Government policy has very clearly changed her car buying decisions.
Complexity. I repair my own vehicles (currently 2 basic cars from the 1970s and 1 from 1990, so ages range 30 to over 50 years old). I do not believe newer EV's will survive past 20 years as it will be uneconomical to replace failing batteries and the technology will be obsolete by then anyway.
I recently scrapped a modern BMW (2007 325 saloon) due to too many electrical problems. It's the only car in 20 years that left me stranded - and it happened twice with different faults ! A faulty brake warning light was going to fail the next MOT and fixing the warning light was going to be a £2000 repair (it needed a new cruise control unit, then taking to a BMW dealer so the electronics could be reset). Electronics on modern cars are too complex to repair economically.