In a lot of the software I've written for businesses telemetry was critical in being able to get quick answers to things like "is anyone using this specific portion of the app?" Or "are the new users using the application yet? "
If you're expecting an answer different than "yes" to either of these questions, it means you've made a very expensive mistake much earlier in the process.
The right time to ask if anyone will be using a specific portion of the app is when the feature is being proposed, not after it's been implemented and released. Replacing discovery up front with post-release telemetry is a sure way to lose money.
Conversely, if you're not making that mistake, then you don't really need telemetry to tell you what you already know.
