I think a lot of the arguing people are doing here is about the usefulness of opt-in vs opt-out. And personally I tend to agree with the side of the opt-out group; telemetry that users opt-in to is just less useful overall for figuring the average needs of your users. Opt-in is way too self-selecting and shows you very little about what actually needs to be worked on for everyone. However, if the telemetry is not privacy-respecting then opt-out is not a good thing at all. But I think I trust the endless OS system that fedora is trying to use.