Windows 11 previews do not require a TPM module, but the final Windows 11 will. Quoting from https://blogs.windows.com/windows-insider/2021/06/28/update-...:

> In support of the Windows 11 system requirements, we’ve set the bar for previewing in our Windows Insider Program to match the minimum system requirements for Windows 11, with the exception for TPM 2.0 and CPU family/model.

So I can install Windows 11 previews, then when the definitive version comes out I would need to downgrade if I don't have a TPM hardware (or if I don't want to enable it for not loosing the possibility to dual boot Linux)? It's nonsense.

I want the old Windows back, couldn't Microsoft just stop making OS and support Windows 7 forever? The last Windows version that just worked, buy a license and use it, no updates every 6 months, no requirement for secure boot, TPM and stupid stuff, no apps, or whatever other stupid thin they invented.

> then when the definitive version comes out I would need to downgrade if I don't have a TPM hardware

Yes, if you do not have TPM hardware you will not be able to run Windows 11 when it is released.

> (or if I don't want to enable it for not loosing the possibility to dual boot Linux)?

TPM does not prevent you from installing or running Linux.