ST is a text editor while Zed is an IDE. I wish there were something like VSCode that is very modular but written in native. But VSCode is good enough and it is my daily driver.
I disagree Zed is an IDE, it is quite far from InteliJ, Borland/Embarcadero, VS, XCode, Eclipse, Netbeans...
If it is about adding enough plugins until it eventually becomes one, then any programmer's editor is an IDE.
Try to use Zed to debug Go code.
Zed is the new emacs?
In Zed, you need to write a full blown plugin, and can change only what the Zed authors exposed through their plugin API.