I started using Notes a lot at some point because it is just right there in the Dock, it has an attractive design, and unlike with text files, it is easy to just drop images into it. Problem is, now I have probably thousands of notes in Notes but as far as I can tell there is no easy way to export them to text format or HTML or any other simple format. I recently tried a third-party app that is supposedly able to do export from Notes to text for you but the exported text files lacked the original note last-modified times and a bunch of the first lines of the original notes were also missing. I wish that Notes itself made it easy to export to text files - I would be ok with not having images exported. It would be really nice to back up all my notes to plain text rather than being locked in to some sort of Apple cloud nonsense. Notes does have a built-in export to PDF feature, but it seems that you can only export one note at a time that way and also, the note last-modified times get dropped on export.

So a word of caution for other Notes users - Notes has its advantages, but if you ever end up with a large number of notes and you want to copy them outside of the Apple ecosystem, it will probably not be straightforward.