It really remains to be seen just how durable the rest of the vehicle will be in 15 or 20 years. The daily bumps and vibrations of driving down the road day after day will take a toll on the secondary electric components, the the touch screen, doors will get out of alignment and not be easy to repair. Seatbelt fabrics degrade and airbags start becoming unreliable.
There needs to be choices for the masses in the middle class that are affordable and reliable. And arguably, if greenhouse gasses reduction is the goal, then it's more important to have more inexpensive affordable cars now than waiting another 15 or 20 years for the "trickle down" effect of overused used cars getting affordable. If those choices don't exist, then EVs won't be more the than a niche market for those with money. The mass numbers of people will simply continue to drive ICE vehicles because they are cheaper to buy and more available.
And it appears car manufacturers have abandoned that market segment and don't appear to be working on them.