Nethack is an amazing deep system to explore and learn about… but it’s not that fun to play (at least once you’ve already been to the late game). It’s more fun to read NetHackWiki than to actually play the game IMO. It would be a huge downgrade from DCSS, which is carefully designed to be fun.
Keeping out a vendor-specific one in favor of a vendor-agnostic one seems actually positive to me. That vendor-specific “superiority” must be fought.