Discovered a new problem (2013 21.5" iMac, Monterey 12.6.1 with OCLP 0.4.11):
Safari (including the Technology Preview) is throwing the "A Problem Repeatedly Occurred" error on certain websites such a Gmail, UPS, Fedex (an error which I had never seen before). It's described here, so it's a thing:
https://browserhow.com/how-to-fix-safari-mac-problem-repeatedly-occurred-error/
I tried disabling Javascript but then sites don't load anyway.
I am not seeing this on my 2013 MacBook Air with the Technology Preview (same update specs and method).
On my MBA, Safari 16.1 continues the earlier problems (takes forever to quit mainly). The Technology Preview may or may not retain pinned tabs between launches and if it does, may reorder them. However the TP is the lesser of the two evil Safaris.
I am so ready to abandon Safari...