Hi!
Sitting not three feet away from me is a Kyocera DA-610 player. In its day it was high end--gold plated connectors and very good build quality throughout. Made sometime in 1985...it still plays well today although the odd disc or track sometimes won't play without a bit of encouragement (usually cycling the tray or going back to another track).
I wondered about that. A number of older players that I have will attempt to play a CD-RW with varying degrees of success. Some of them are even temperature sensitive! The oldest player I presently have that can play CD-RW discs reliably all of the time is a very early Philips/LMS 1X CD-ROM that came with a PC soundcard. It still amazes me that it can do so, but it does.
William