Anecdotally, yesterday I launched the Windows sandbox to investigate some files and noticed that notepad.exe was not available. A quick research revealed that this is because notepad.exe was replaced by the modern variant with Colipot and shit, which is an AppX package (Windows Store file format). And since the store was ripped out of the sandbox, there's no Notepad in it.

I'm not sure I would say Microsoft forgot about the store. I think Microsoft is like a Dog that has no head, no legs, only tails. And these tails have their own will and don't care about the dog in the slightest.

rumour has it the next version of windows will be called Microsoft 365 Azure for Desktop XBOX Edition so that each of the executives in the money making sections gets their piece.