You make a good point.
I’m going to explore this idea further though. I started another seperate thread about it ““Fake” CD/Cartridge Support” See if I can’t flesh this out more.
Any news here? I’m currently going through my PS1 collection and having to backup all games can get quite annoying. CD Drive support would be blessing. 
The update is that there is now a bounty going (contributors welcome!): Real CD/DVD read support
A few coders have looked at the issue but as far as I know there is no one who is working on new code yet. The bounty has only just started though, it may get a bigger and also may attract more attention over time.