Have you ever worked on a large-scale software product used by millions of people across thousands of kinds of devices? Telemetry is always going to be useful.
Useful for what? We've had an explosion of telemetry and "analytics" the past decade and software quality and functionality has only gone downhill. In some fields we've outright regressed compared to early 2000s tooling.
A simple example is that despite all the telemetry, manpower and tech innovation, every single mainstream communications product out there is inferior to pre-Microsoft Skype (despite the latter being built with much less manpower and running on much more primitive hardware & bandwidth).
Of course, not all of this devolution is to blame on telemetry alone, but I disagree that telemetry is some sort of requirement or game-changer when it comes to software quality. We've successfully built good quality software before it and within reasonable budgets.
I do agree that it seems that despite increased capabilities across the board and piles and piles of newer and better ways to do things, the quality of consumer software has dropped somewhat.