There were losses:
skippy-xd no longer runs for me.
sct is also not in any bookworm repo, but the *.deb from Bullseye can be installed with gdebi without any problems and works as it should.
I only used the list from user-installed-packages as a reminder, because there were a few programmes I didn't want to install anymore, too many programmes I only tested. The current list is more "compact
Otherwise, everything easy, no problems
With the appropriate configuration and the fairly recent liquorix kernel from the mxpi, the ram requirement after boot is around 300gb. this is only a few MB more than what the liquorix kernel required under Bullsey, for me no indication that the new version requires more ram.
This may be true for the mainstream lts kernel, which is not interesting for fans of wild optimisation ;-}
