Not only CD-R, but DVD-R as well. Not sure it's as much missing/loss of data as readability of various CD/DVD players/burners. I pulled an old working burner out of a retired desktop & replaced a newer one in my 'new' desktop specifically because it would read things the newer unit wouldn't. Seems a lot of my VHS>DVD conversions, even though finalized at time of burning, are not readable even in my Oppo 203. Lots of "unknown disc" messages there.
No such issue with vinyl, or my old self recorded cassettes (which still sound very good). Newer isn't always better, or more reliable.
