I think the big oof repair with used EV is the inevitable battery replacement. That can't be cheap, especially for a used car.
Outside of the richest countries there are whole communities who'd never buy a new car, because the car they can afford to buy is a much-used cheap car that's the same age as the first-year Leaf is now; the rich countries/communities drive the first 10 years of a car, buy a new car, and the used car gets sold in poorer areas where most people don't ever buy new cars, because even the entry level new cars are like twice the cost they would afford. The ICE market provides a significant quantity of such used cars, which are cheap because of the wear and tear of being 10-15 years old but are still likely to be usable for a very long time if you maintain them properly.
Are 15 year old Leafs a comparable alternative to 15 year old ICE Hondas? If after the EV revolution buying a 15 year old car ceases to be an affordable option because it will need an unreasonably expensive replacement (compared to the value of such an old car) to be usable for 10 more years, then that's a major societal change in the affordability of transport.
And real world data does not suggest that will be needed at all. Sure there are outliers like someone damaging battery by doing only supercharging but that's exception like not changing oil in ICE.
For example, the first reasonable site I googled for replacement costs (https://www.consumeraffairs.com/automotive/ev-battery-replac...) asserts that the battery replacement for a Leaf would cost on average $17,657 - but I'm talking about a target audience who currently would buy a $10,000 car and expect to use it for many more years; current ICE cars enable that, but if getting a usable range from a Leaf when they'll be 15-20 years old will require a replacement battery, that's not going to work out. The replacement batteries for full EVs (as opposed to hybrids with smaller capacity) are more expensive than even full engine replacements or full transmission replacements for old ICE cars, and even very old ICE cars usually don't need a full engine replacement but can work (with usable range!) with much cheaper repairs.
In essence, my doubts are about the longevity of EV cars - what proportion of EVs will be usable/used when they will be 15, 20 or 25 years old (or after 100k / 200k miles), and how that compares to the same metric for the current ICE cars; a downgrade there won't be a big difference for the relatively wealthy buyers of new cars now, but it can be a kick in the balls for the poorer communities in a few decades if the affordable used (and I mean significantly used, not those which were just leased for a few years) cars cease to exist.
https://www.youtube.com/watch?v=VmWL1hZQmD0
It means you can have a battery subscription rather than buying the battery. A subscription keeps your battery new and also lets you swap between higher and lower capacity batteries as needed.
Nio has 70, 75, 100, and 150 kWh packs in the same physical pack dimensions:
https://cnevpost.com/2023/07/07/nio-user-manuals-include-150...