My number one problem with notes apps is that they all take too long to open a new note, and try to sync themselves when opened, often slowing everything down. Especially if you have a slow / choppy connection (fully offline is usually ok, but barely online is the worst). I have a literal supercomputer in my pocket, yet not one app let's me open and start writing a critical note in less than 500ms. To this day I stil…
IME Apple Notes does this with Quick Notes (accessible a bunch of different ways depending on platform) on iOS and macOS.