To get back on topic, could we have the opportunity to play DX-Ball nowadays if it was full of today-standard DRMs? Well, tbh, probably yes, but only by adding a useless cracking procedure.
Nonetheless, I totally agree with you and I myself have a « DX-Ball (2) Mods » folder on my PC for the last two decades :)
Are they not totally and completely crushing the competition already?
GOG also bans third party DRM software. It's great, but big publishers don't like that which is why GOG is mostly indie.
Speaking as someone who actually does this (because I despise the Steam client), it’s not easy. Different games need different Steam emulators to work, and titles that seem to run initially will break in weird ways mid-game.
While not huge, it is a pretty big list.
I've actually had much better luck with the Epic Game Store, although it's seemingly not as good as it used to be.
You have to be careful sometimes with nostalgia but man, that was a great time to explore.