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.
Both AMD and Intel bake a hardware TPM into their CPUs IIRC. I think Windows 11 complains more about Secure Boot not being enabled on my PC than the TPM.