I used to use separate of each, but switched to the ones integrated into Zed. being able to click on a file in one and have it open one frame later in the others is very productive for me. e.g. click a link in my test runner's output to a line in a file and immediately jump to that file in the file tree and that line in a buffer.

Hmm, open tab performance hasn't been a concern of mine... since the turn of the century? (cough) Not using electron of course.

I suspect a preference here has more to do with how many monitors one has. I have multiple so prefer multiple windows. If away from my desk, having a fullscreen window split makes sense.

Yeah, in my office I use a single ultrawide. And I'm often programming away from a desk on a laptop.

Back in the day I had a multi-monitor setup and that was super nice with a tiling VM and a terminal/*nix based development environment.