every car in my country has aftermarket parts available, that’s not really the defining factor. old cars get progressively worse to maintain unless you spend a small fortune to restore it and even then.

supply and demand is irrelevant whenever they forbid you from running an old “gas guzzler”, or do cash for clunkers again to restrict supply. or insurance stops liking cars without tracking. or just about anything to curb it…

as i said we have to address how new stuff is made or we will just be pushing the problem to the future, not actually solving it.