Windows Update has a habit of simply ignoring your PC until MS bizarre reqts are met so were out of luck that way. But with a ISO install then maybe its possible to get W11 if the checks are then only advisory.The hard/soft floors mentioned earlier may be a way out of all this though too, I think people around the net are too focused on this TPM req and CPU support list that this is being missed left right and centre. MS page says as long as hard limits are met, then CPU generation and TPM2.0 not being met (soft floors) will merely prompt a warning advising not to upgrade which will be something worded about security we all know... and will ignore.
If that's the case then I will simply upgrade ignoring the warning and then slowly upgrade mobo and CPU like I have always done. I will need to convert my SSD to GPT though but that conversion tool can do that without any fuss if Windows 11 installer doesn't do that as part of the upgrade anyway. I don't see how GPT is a hard limit though since secure boot/TPM is a soft limit so the need for GPT is a non issue.
The CPU reqt is pretty firm right now - I just assumed the 6700K would be OK until I looked at the list of supported CPUs and theres nothing older than i7-8xxx.
Its worth going ahead with GPT anyway while we wait for MS to change their minds about this.