My reason to have Bootcamp is literally to get Elgato Game capture, used to capture the presenter's screen real time, support in OBS so that I can livestream a Bsides conference once a year. I use an old Canopus firewire SD video to live transcode the camcorder in that setup.

I tried to do this in Parallels, but it just didn't work. Turns out live video composition and broadcasting needs the bare metal.