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.
haiku2077
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.
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.