In the 90's -- most consumer CD players and even worse DVD and worst of all DAT players were really poorly made. It didn't seem like there was much difference in them when you opened them up, 90's cassette decks too. I never did have a CD or DVD player that lasted more than a few years. My cassettes get a lot more attention these days because you have to go all stereophile (sadly) to get a robust CD player, CD collection is collecting dust!
Those recording Walkmans were great, I could use one now!
What usually went first in the CD players of that era were the laser pickup. Even Pioneer CD players (which were a standard in radio for a while) had a certain lifetime -- and the weak part was that laser pickup. They lasted longer than a stylus on a turntable, but whether they lasted longer than the head on a cassette deck is a good question. I think a lot of the CD players in the late 80's and early 90's were made in the same handful of Japanese and Korean factories, before everything moved to China and other Asian countries.
The CD technology overall was excellent, but the weakest part was the laser pickup (and bad scratches, of course). I had a Korean made, black CD boombox that played CD's from 1991 until well into the 2000's. Got it at a KMart, if memory serves. Then I had a "professional" CD player I got at a guitar / sound store that barely lasted a year. Sometimes you'd get a good one.... and then....
Of course, now CD players are getting as rare as hen's teeth.
RE: Sony: they definitely will be missed here... Luckily the Sonys I have work well, except an ICF5900W which only works on MW and FM. The other Sony items work like champs.