Now I'd like to swing back to the question of text editing.
There are lots of editors to choose from. They all presumably have advantages and disadvantages. I'd like to host a discussion here. What would be the best editor to use?
The genre of editor that makes the most sense is one that's trying to mirror the Medium feature set. That's what both these editors aim to do.
This is a decision lots of other people have had to make.
For example, what does Ghost use? I assume WordPress wrote their own? Did they? Tumblr?
They all had to make the same decision.
I decided to put a very low-tech plug-in architecture in MWE.
You can read about it here.
In a word, the architecture is this: fork.