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 agree that there is beauty in simplicity. In my opinion, OpenBSD has the best website.
It's not about using fancy effects, it's about the sprawling logical layout and making it hard to navigate. It used to be better around 2005, when it had the left navigation index. I remember people said it was ugly then, but imho they changed the wrong aspects of it, removing the structure without adding simplicity.
For example, a new user reading this page https://l10n.debian.org/ will be confused. It only makes sense to me since I've already translated a bunch of debconf-po-files. These are my opinions, but you are welcome to disagree. Also, please don't hit people with rolled up newspapers, it's rude.