Microsoft rolls out revamped Notepad app to Windows 11 Insiders
Dark mode and updated look are the biggest changes to Notepad in quite a while.
arstechnica.com
A friend has Windows 11 . His machine Idle RAM usage is 20% less than my Win 10. Both are 16 GB I think Windows did some optimization. You can check Linus Tech Tips forum. You will definitely find people discussing this.