1. Secure - E2E encrypted on cloud storage, vendor cannot read it
2. Accessible - standalone native app on desktop and mobile on all platforms (Linux, Windows, Mac/iOS, Android)
3. Simple - love how Apple doesn't even make you "title" notes, it just takes the first line
4. Shareable - with others with editing privs eg a grocery list for family
5. Paid - that way I know it's sustainable and not some data scam
6. Plain - Base version has no ability to publish to a blog or any junk like that.
7. Open source
I just subscribed to Standard Notes:https://standardnotes.com/
Standard Notes has #1, #2, #5, and#7. But UI is more cluttered than iOS. And not shareable with editing privs.