Bachus
agree 100%
MAJOR updates (full versions)
should be a TOTAL delete and RELOAD from scratch
like an IMAGE file
like you said, user backs up all his styles works , etc
then loads entire new OS, which erase ALL, reloads ALL
then user loads back his new styles,
this "patch" update and coming in parts is asking for big TROUBLE,
and the results well, you see what's happening...
just my $0.02