It's basically already been said but, this seems absurd. I'm not quite sure what TRUE benefit you'd get from this but it seems more frustrating than it's worth. I can't figure out a reason to do this unless I'm just in the mood to piss myself off.
Personally this is perfect! I like it for organization...
Having 20 work-trees with 20 terminals (for running the server) with 20 browser tabs open became a pain to organize; with campus I can visually lay them out and know which one is linked to which one (this was near impossible before so im sold)
I can’t help but see this as a productivity illusion. “Hey now I really can work on three things at once”. Then someone asks you a question a week later and you have zero memory of doing anything with that project.