Yeah, you have to go back to the 2000s-2010s era and when abundant spare parts and junkyards start to run out, be prepared to invest new-car level cash in custom fabrication and mechanical work to keep it on the road. Cars don't really have to be as complicated or expensive as they are, but for now, they're always going to be. People have always been custom-building cars for show, for history, for racing, for performance, and pretty soon we're going to start doing it for daily drivers too, and it'll stay that way until they start changing the laws to try to force these cars off the road for environmental reasons. Until then, support your local custom car builders, they're going to become the future of repairable cars, at least when it comes to the pre-EV gas guzzlers.

Most manufacturer software is easy to find online.

Isn't that the one created/owned by Amazon? I'm not sure you'll be correct.

Its literally funded by Amazon. Hard fucking pass.

It’s still required to have all the mandatory safety systems like automatic braking, back up camera etc. And to have those systems, all the brake and steering systems will require the same electronics as every other brand. It’s also why Toyota techs hate working on the Supra, because it actually uses design/tech from this decade, and it even uses BMW electronics that are two generations behind current BMWs.