Please don't forget about accessibility. Getting this right from day 1 will make your life a lot easier in the long run. If I remember correctly, I was never able to use Atom with a screen reader. Hearing custom UI already makes me nervous and I'm pretty sure I won't be able to use Zed with a screen reader either.

Blind developers exist. Please don't forget about us. It's one of the few areas where we can actually make a meaningful difference together with our peers on an equal playing field.