The learning curve for the editor isn’t steep, but the style of editor is unfamiliar for a lot of people. Even as a developer it took me a week or two of getting used to. Absolutely love it now, but I remember the awkwardness of the first week, which actually put me off the platform alltogether.
And this goes for a number of non developers on our instance. Some of them just don’t get the editor, but after one or two posts they’re fine. I found that running a welcome session where I just got everyone to just post a picture of a cat was pretty helpful. If I did that again I’d run a session where they have to post a picture of a cat, use some headers and write a silly bio about the cat as well, just to encourage them to use markdown(many of our users are not familiar with markdown).