Like many other extensions, I think this one will just depend on the type of community whether it’s worth it or not. Not just due to size but functionality. And this is something I’ve experienced with many other wysiwyg editors. There’s many positives and negatives, so you just have to decide what’s worth it and what’s not worth it.
For a poetry forum I have I’m going back to the standard editor. Because I need that single line type of experience... regular line breaks versus paragraphs for every line return. But, I also use Flarum for my personal blog. There, this extension will work great. Because there I’m writing standard paragraphs.
I can see why this was never part of core from the beginning. Because there’s so many variables and preferences.
One more FYI for a future release. Inserting links isn’t working for me on mobile.
I still think this extension is amazing and I thank @askvortsov for creating it. Again, depending on the community, this was needed.