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.
It would be a fair assumption if Microsoft’s clients were individuals and businesses, but their main clients are the OEMs that buy and package Windows licenses with the computers they sell.
Now, I don’t see why OEMs would ask Microsoft to drop this requirement (it’s not particularly hard or unbearably expensive to add TPM), and even if they did they don’t have a say in this as Microsoft has hard hardware requirements for Windows PC.
OEMs benefit from the rule. People (as in the average non-techie) who have older hardware or don’t have the right bios settings will feel the need to purchase new hardware that is already running the latest version of Windows.