So I used OCL to get to Sequoia and was quite pleased until I tried to run youtube videos - then the windowserver process took up 150-300% of the CPU and ran the fans up.
Decided to revert back to Monterey and booted from the MacOS internet recovery facility, wiped _everything_ (top level disk on down) and re-installed Monterey. Then re-installed Monterey again without restoring my data and the Sequoia preference data, then restored just my $HOME data and applications. And not the preferences.
Seems to be working fine, but the boot process is taking a loooong time.
I assumed that wiping the disk completely would remove OCLP, but are there artifacts still left in NVRAM? When it boots I'll do a PRAM reset, but wondered if there was more to do.
(Uninstall guide seems to think complete wipe is sufficient, but thought I'd check.)
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