I've owned several cars made in the 80s, didn't have many problems. Even with less reliable cars like the '85 LeBaron GTS (2.2 turbo, bad about leaking a lot of things and timing issues, along with head gaskets. I had none of these.) The alternator went out in it once. That was the only problem I ever had, and that was after getting it back from my friend.
My '82 Corolla I bought for $150, delivered to me from a place 2 hours away. Put gas in it and a hot battery, blew air through the fuel line to break the fuel pump loose, bam. It ran ever since. And that thing even had ice cold A/C. I sold it for $500 a while later after getting it back from the same friend who fucked my LeBaron's alternator.
My '88 Lancer that has 96k on it, runs and drives. It's got a front seal leaking but it has NEVER let me down. One day I snapped the accessory drive belt at the beginning of a two hour drive, it also drives the water pump. It still didn't overheat. It's a fucking miracle.
Tons of others. Old cars were just built better. Excluding some.
The Cadillac Cimarron was shit, comparing it to other cars of that era is like comparing the 2008 Zastava Koral to a 2008 Cadillac CTS-V.