[slipmagic]

Where there's demand for privacy and security, notepad falls short, as you cannot password-protect your notes. This is part of what Standard Notes addresses. If you don't need it, then that's fine. I use Dynalist for my notes.

[1] - https://dynalist.io

[DaiPlusPlus]

On Windows, there's EFS and NTFS ACLs for privacy (and BitLocker, of course). For portable encryption you can use 7-Zip with encrypted archives, and as a bonus: 7-Zip's archive manager lets you edit text files in-place (well, it does extract and recompress them when you're done, but the UX is such you don't need to mess around with file management yourself).