Simon> However, the problem with freezing testing but not freezing Simon> unstable is that if you do that, all updates to testing Simon> during the freeze (to fix the release-critical bugs that stop Simon> it from already being ready for release) have to go into Simon> testing via testing-proposed-updates, which approximately Simon> nobody uses.
Have we ever looked into getting more people to use TPU so it's a viable path? This issue comes up often enough that it's clear a significant chunk of the community wants it. I understand that it probably would take years to overcome all the obstacles-- I think there are several you didn't mention. But this has been going on for years, so I'm wondering if anyone has been willing to put in effort on things like trying to convince people to test out TPU, or making it easier to run QA/autopkgtest/etc against TPU, etc.