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.
The one thing I wish every distro would incorporate is the way Gentoo handles config file updates. If there are any changes you get the option of using a very simple side by side merge where you go through all the differences of the old and new configuration where you can decide which one to use going forward.
Pacman just dumps you a .pacnew, leaving the comparison to you (y’know, KISS). Your change isn’t touched, unless it’s .pacsave.
Pacdiff does this on arch-based distros