400+ Arch Linux AUR Packages Compromised in a Supply Chain Attack Deploying Infostealers
(cybersecuritynews.com)
I think the comment makes sense, if more packages were supported on the main Arch repos there would be less of a need to use the AUR or Flatpaks.
There are definitely some big gaps on the Arch repos (web browsers in particular) that I would like to see improved.