Not everybody’s going to be on Windows 10 or 11, not everyone can upgrade, not everyone wants to upgrade for any number of reasons. The beta ran on Windows 7 or 8, just a couple of months ago the system requirements used to list Windows 7 as the minimum supported. Was there a significant tech or engine update that would require Windows 10/11? It doesn’t look like it.
Gaming and media websites are still listing Windows 7 as the minimum. Which I can’t link to but you can search and see.
What changed?