When you detach from a project, is that fact communicated to the server?
I would think that could be useful, but have never seen it mentioned.

I keep a few dead projects around so I can test questions like that ;-)

'Reset project' appeared in the Event Log before final detach, but there was no attempt to make any communication with the project. It's possible that there might have been an attempt to report any final tasks, but it wasn't needed in this case.

Given that one of the main reasons for detaching a project is because it's stopped sending out work, and may have switched off its servers, or even had its domain name recycled to a new organisation, I don't think there's much to be gained by contacting the server - and it might even be dangerous.

Thanks. That is the definitive answer. Yes, it usually is not relevant anyway.