I think you can also learn from users when they complain en masse about the current atrocious state of software quality. But I guess that doesn't show up in telemetry. Until it does. Looking at you, Microsoft!

I believe one of the main reasons why Windows 11 is getting so much vitriol is that Microsoft is focusing on customers, which aren't always identical to users. Most of the time, when you buy a Windows-based device, you're not their customer: you're the OEM's customer, and for the OEM, every nickel of expenses counts. On the other hand, direct Microsoft licensees, such as corporate ("enterprise") customers, get much more attention from the company and a significantly better experience.

You can't learn from this because users always complain no matter what.

The trick is they just complain about the last thing they remember being bad, so it's a good sign when that doesn't change, and it's bad if they start complaining about a new thing.