For example, I’m using Debian, and I think we could learn a thing or two from Mint about how to make it “friendlier” for new users. I often see Mint recommended to new users, but rarely Debian, which has a goal to be “the universal operating system”.
I also think we could learn website design from… looks at notes …everyone else.

    • Well, then it is cheating.

      It would also be kind of weird to compare to Arch, since Arch makes you configure so much yourself.
      Like, my biggest complaint is that I feel extremely naked without automatic btrfs snapshots. Obviously, you could configure those on Arch, but that would require understanding significantly more about btrfs than I currently do.