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.
I think text based interfaces is a strength of unix-like systems, valuable tools to be used when the situation calls for it. It might be a lot to ask of new users to be familiar with terminals before they have even installed the system though. If Mint can get the same result with a GUI, I see no reason why Debian can’t offer that option too, and let users discover bash and TUI when they have a working system.