BUT , have you attempted to work on a modern car lately? Every one of the items above the individual with mere cursory knowledge can accomplish quite easily , not so much nowadays.
To say nothing of fuel pumps you have to drop the tank to get to , the various smog systems tied into the CPU etc.etc.etc.
And I would dispute that " rust out in a few years" , sorry but I live where they still use salt on the roads in winter , 3-5 year old cars with body rot and rust are quite common here.
As an example of reliability , I put better than 400k on a 225 inch slant six with nothing more than routine maintenance.
I will agree vociferously as regards the plan for the increasingly obsolete that started in the early to mid '70s and ran through the early '90s , witness the atrocious series of Chevy small blocks with phenolic resin timing gears , cams that went flat at 30k miles , valves that would spit a head into the combustion chamber at anything over 4500 rpm , computers with no backup circuit , nightmare distributors that would lose the hall effect sensor , main bearings our of silly putty and connectings of taffy.
And though I'm rather a Mopar nut , don't even get me started on the "disposable" offerings from Chrysler , including the Caravan.