I worked on an old Honda Odyssey that I bought used from a friend for $100. It took at least $2000 in parts but I could find all the parts on RockAuto.com (The site is ugly but functional). Just like cars, in the long-run, I think bringing products to market which are repairable will help create trust between manufacturer and end-user. In fact, the resale value of an older item depends on the affordability of the rep…
Unfortunately, Tesla is starting to build their battery packs in-frame so it'll become harder to repair. https://electrek.co/2021/01/19/tesla-structural-battery-pack...
But if it's standardized, if it's EOL the battery pack can be replaced with either a new, better battery (e.g. solid state) or a refurbished / secondhand battery. And the EOL battery pack handed in for refurbishment, which hopefully significantly reduces cost.
Then again, I'm reading that the average car is scrapped after about 14 years. Might be high-end Model S-es may live longer, but if we get more cheap EVs, refurbishing the battery won't be viable no matter how cheap they make it.