Looks impressive, especially considering how fast is loads. One nitpick of my is the blurry font rendering. I suppose getting sharp and clear fonts is quite complicated task.
The font rendering looks about right on Safari. Is it blurry, or is it just doing Mac-style antialiasing?
It probably looks ok on HiDPI, unfortunately a lot of these hipster tools not supporting legacy but well trodden text rendering implementations are LoDPI unfriendly.
https://github.com/zed-industries/zed/issues/7992