This is indeed a challenge and there is a practical limit to how many you can manage at once. It really depends on what I’m working on, for a sufficiently large enough project there are lots of independent tasks that can be delivered in isolation and so it’s rarely a case of babysitting all of them in realtime.
I tend to have one session that I’m actively focused on as my primary session, everything else I come back to every ~5-10 minutes to nudge them along while I’m waiting on the ‘main thread’. If my core task demands more of my time to think then I check less often.
The important thing is to find what works for you. If Cursor is giving you enough productivity then that’s awesome, carry on with it! I would recommend trying out other workflows, weighing up the pros/cons yourself and ultimately find what works for you. TUI-driven development isn’t for everyone in the same way not everyone likes to use vim and that’s okay.
Then when it's all over, how do you evaluate which one to keep?