Opt-in beta test still planned for the future. Jorg estimates maybe 5000 players would join an opt-in beta test

DO they, or is that just wishful thinking … at no time has there been any definitive, technical information released as to exactly what MS / Asobo might be getting back from users PCs.
IF connected to their system, they can see users dropping off the system, but are User’s PC actaually sending in Crash reports, as they do for some other Apps.

Most other Apps, when they crash, are programmed to send in a Crash Report to MS, pop up a notification, showing you what is going to be sent, and asking permission to send that data.

I have seen no such notification with MSFS, nor do I recall agreeing to a blanket permission to send data back to MS for MSFS.
And this has never been talked about or disclosed when the subject come up is any user/MS discussions.

Having said that, I personally have no problem with MSFS sending any relevant Crash Information to MS - the more that can be done to fix these issues the better - but as a software Dev, I have to wonder what is really being sent back, if anything.