"For most people, they probably just want a full-featured OS."
I don't think so. Most people just want to get to their websites or email. They don't care about the OS, and may not even know what an OS is.
The problem is that they may just click "yes" on any popups, to make them go away - which is probably what Microsoft wants. "Yes" track me, "yes" show me ads, etc.
For your average user, Xubuntu or Mint are both great choices: simple, understandable desktops, and otherwise they stay out of the way. I set up Xubuntu for my elderly BIL a few months ago. He's a smart guy, but completely non-technical. One support call since, otherwise he has reported no problems.
I think the challenge is where do you draw the line between the OS and the set of baseline applications it comes with, and then further questions on what is included in that (default?) set or how full featured they are. What is a feature of the OS? That's before considering how users discover and manage other software for activities not covered by whatever is OS provided.