All cars could last a lot longer if people kept maintaining them and - importantly - didn’t damage them. Electric cars are not going to be immune to this, I can’t see them lasting much longer on average than ICE cars.
Keep in mind that even when you change out the engine for something with less parts the rest of the car still remains and contains things which will eventually cause issues. For example I bought a cheap van a few months ago and here’s some of the reasons it was cheap that are not ICE specific:
- Steering wheel lock mechanism sticking
- Air distribution flap cables kinked/binding so A/C only blew at feet
- Central locking on side door sticking
- Rear shocks leaking
- Front strut mount bushings worn
- Head unit not functioning
Presumably the previous owner just didn’t want to spend the money on fixing these issues as they arose, and eventually it added up into a lot of potential expense (if you have to pay someone to fix it for you) and more reasons to sell the car. Such behaviour seems pretty common in my experience and I fully expect it to continue with EVs. It’ll be hard enough to get people to even maintain their brakes and change the motor coolant considering the natural reluctance of people to spend money on maintenance and this unfortunately prevalent idea that EVs don’t need it.
Funnily enough the main ICE specific problem with that van was just as much an electrical issue as part of the petrol engine - an intermittent secondary air injection error code which ended up being down to a combination of a sticking valve and a fuse with a hairline crack causing an intermittent connection.
Yes, the move towards integrating the infotainment further into the car with propitiatory parts instead of generic sizes and not separating out vehicle related controls is definitely going to make long term upkeep harder.