Suppose you want to use asterisks to mark footnotes.* As soon as you add a second footnote,** you're in trouble because your asterisks disappear and everything between them turns bold.
* I had to escape all of these asterisks.
** I see this happen fairly often to people's comments here.
If you copy-paste from the notes app, it tends to do a reasonable job transforming it’s formatting into a plain-text representation.(Or rich-text, if you paste into an app that supports it, like Pages or Mail.)
I am a little worried that some day these tools will disappear, but iirc the notes are just kept in an sqlite database so it shouldn’t be too hard to hack your data out manually, either.
There are a number of little handheld gadgets that you can use with MakeCode—scroll down on the homepage and there’s a section that shows them all:
https://arcade.makecode.com/