The ergonomics of the new version are slightly different. The default behavior of opening tabs with previously-open files is jarring to me. I just remove it (Powershell command line in another comment) and the original "Notepad.exe" takes over.

I've spent a long time building up my muscle memory. I don't want my tools changing out from under me. If they wanted to ship an "enhanced" notepad they should have called its something else.