Or maybe they will launch Win 12 with optional TPM support.
Imho making the OS(es) TPM only cannot be good for their business, many people are still on Win 10 with no intention to switch, since their motheboard does not support TPM and do not want to upgrade PC / waste PCI-E slot on TPM extension.
You mean a massively patched windows 2000 with modern OS? Does Linux count, or BSD? How about macOS?
Linux if you’re prepared to support it entirely yourself and still have functional issues.
MacOS if you want to pay 3x the price for hardware that’s 1/2 as capable and has locked you out of modifications.