User Research isn't omniscient by any means and has the same opt-in biases. (More so, even, because most User Research wants to be done in lab environments and

User Research isn't omniscient by any means and has the same opt-in biases. (More so, even, because most User Research wants to be done in lab environments and that raises the bar from "press check-box for passive data gathering" to "can physically get to lab for testing". Even the middle ground of "surveys" still has a time/attention/patience bar to hurdle that telemetry does not.) Microsoft certainly used both Telemetry and lots of User Research in the Windows 8 development process, and clearly had many of the same blind spots in both. The point remains that opting into telemetry is still the lowest bar to hop as a user to getting your "voice" heard (as aggregate statistics).