Winhance, an open-source Windows 10 and 11 optimization tool, now uses WinUI 3, reduces RAM usage, and adds safer system tweak options.
Windows To Go is still an option, if you know where to look ...
You probably already know that you can manually install a fresh copy of Windows using your own install media. You can create this install media using Microsoft's tool, or you can use a tool like Rufus ...