A quick run of the Garlin Check UEFI CA2023 script this morning shows post Patch Tuesday CA-2011 certs still kickin'...
Rare update BSOD proves benign as I update both GPU drivers in a remote desktop session, crashing driver and PC, with no ill aftermath.
OCuLink offers a Viable TB4/5 alternative: it's cheaper and faster, and not subject to Intel certification requirements. Will it work?
The Promontory 21 chip isn't locked to AMD CPUs in any way, so you can use it with anything.