Many vehicles from 30 years ago were indeed quite good. The rest were piles of junk

. I can attest to the sheer number of S-10s, Cavaliers, Stratuses, Taurases, Berettas, Dakotas, Neons, Eclipses, Voyagers, and Explorers that have all but vanished from American roads. Franky the only vehicles from that time period I see with any consistency are some of the domestic trucks (principal the 12v Cummins Dodges and Ford F150s, plus the occasional Chevy) and Toyota SUVs. There are of course the Japanese bubble-era cars, but those are really just collector items and not being driven much.
On the whole - I do believe the 2024 fleet is more reliable than the 1994 fleet. But several of the 1994 fleet will probably be more reliable than some of the 2024 fleet.