As much as I love Zed, I am of the belief that VScode (and its derivatives) will remain the dominant build-your-own IDE for a really long time unless something like Zed can support web based extensions. I created a VScode extension for chip designers and I would love to port it to Zed, but I can't because it's a visualization extension with a custom webview.

I realize the irony here that Zed is fast because it's not web based, but I stand by my claim that being able to optionally display web UIs would be a really cool feature to have. It would open the door to a lot of extensions.