When I’m writing, I need as little distraction as possible; I need to get the words out. I do Markdown, but asterisks, octothorps, and other formatting text are visual noise. When I get to publishing the piece, yes, show me all the formatting details because I need to see these details to edit and format it properly, but when I’m in the zone, I need sweet, sweet, cleanly formatted words.
I don't use Bear for notes myself, but I did enjoy this look at what's changed in the recent 2.0 update.
I'm linking to this paragraph because it reminds me how subjective all this software stuff really is. The author confidently and clearly states that they do not want to see Markdown as they work. I know other people who would unquestionably argue the opposite, and would say "the entire point of Markdown is that you can see it and still read what you're writing."