Tom's Hardware on MSN

RetroPad is a ‘full-feature-parity version of Notepad from XP’ in just 2,749 bytes

You can grab the RetroPad code and .exe from GitHub.
Ars Technica

In 3.5 years, Notepad.exe has gone from “barely maintained” to “it writes for you”

There's a difference between the "Notepad app" and notepad.exe. The Notepad app has the AI and all the new stuff in it. But the old C : \windows\system32\notepad.exe still exists, and is unencumbered ...