so how is telemetry not open? If you don't like telemetry for dogmatic reasons then don't use it. Find the alternative magical product whose dev team is able to improve the software blindfolded

> Find the alternative magical product whose dev team is able to improve the software blindfolded

The choice isn't "telemetry or you're blindfolded", the other options include actually interacting with your userbase. Surveys exist, interviews exist, focus groups exist, fostering communities that you can engage is a thing, etc.

For example, I was recruited and paid $500 to spend an hour on a panel discussing what developers want out of platforms like DigitalOcean, what we don't like, where our pain points are. I put the dollar amount there only to emphasize how valuable such information is from one user. You don't get that kind of information from telemetry.

Or by testing it themselves.