Are they not pushing updates out for Windows 11 on machines without TPM 2.0? If they are then it's still "supported" lol.

Edit: After finding the actual post from Microsoft, yes, they're saying they may not continue to provide patches for this. Time will tell. I believe they'd rather have more people using Windows 11 than Windows 10 and if many people with legacy BIOS systems upgrade to Windows 11 they may continue to support them. Just like the full screen ads they pushed to get people to upgrade hardware, I think this messaging is moreso meant to scare people to upgrade hardware, but I believe the data they're gonna suck out of these older systems on Windows 11 is likely more valuable to them than the cost of supporting BIOS.

The following disclaimer applies if Windows 11 is installed on a device that doesn't meet the minimum system requirements:

This PC doesn't meet the minimum system requirements for running Windows 11 - these requirements help ensure a more reliable and higher quality experience. Installing Windows 11 on this PC is not recommended and may result in compatibility issues. If you proceed with installing Windows 11, your PC will no longer be supported and won't be entitled to receive updates. Damages to your PC due to lack of compatibility aren't covered under the manufacturer warranty. By selecting Accept, you are acknowledging that you read and understand this statement.