Windows code named "Sun Valley" has been in the pipeline for ages and has been in the hands of Windows Insiders for early testing.
It is not, contrary to the hype (some of it being ginned up by Microsoft), a fundamentally new Windows. Much ado about not much.
Brian - Windows 10, 64-Bit, Version 21H1, Build 19043
It is better to be hated for what you are than to be loved for what you are not.
~ André Gide