If CD-Rs destroy systems they sure take a looooooong time to do it. The logic behind the theory is shaky at best, IMO.
It depends how much you use them, and the current state of your stuff.
You can detect impending laser doom sooner if you use garbage CD-Rs and find that it doesn't load or the audio is all skippy.
This applies to the PC-FX also.
but I mean, in the end it's about the same as playing really f*ckin scratched up discs in it.
The thing I avoid the most are those heavy/thick/dyed discs just because they're heavier and load like shit for some reason.
Reminds me of PS2s. They'd eventually start making gross noises when reading PS1 discs, or older (or was it newer) PS2 discs .