[SebastianKra]

Last time I checked, Notes.app couldn't even export notes in formats other than PDF.

[freetonik]

There are some open source tools, e.g. https://github.com/storizzi/notes-exporter I've used another tool in the past (cannot remember the name), and it worked ok.

I personally cannot trust Apple to store data, so I only use Apple Notes for throw-away notes like shopping lists.

[criddell]

Considering it's likely the most used note keeping app there is, that isn't much of a blocker for an awful lot of people.