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.
Yeah, this is the old philosophy of the "run anywhere" philosophy of linux (or computers in general) that got us here. Another problem with stripping down kernel drivers is that swapping hardware component will require rebuilding the kernel, which regular user will definitely not be happy about.