I don't get the problem with the Microsoft repo on RPis. I mean they're devices at their core meant for children and beginner coders (whether that's their common real world use or not), so it stands to reason that on the default os they'll have a repo that likely allows some common programs to function (VSCode for example). Also, it's only on the default OS. The kind of people who will be bothered by this sort of thing aren't using RPi OS, they're using ALARM or Void or something like that.