Don't you guys have phones!?!?
Nah seriously, if it's a cutscene I'll mess about on my phone or I'll be listening to some music/podcast, and this is on ps4 where we don't have the luxury of having multiple windows open like on PC. There is lots to do while waiting just have to find something.
MSQ scenes are a good few minutes, there is plenty of time to do irl stuff and come back but not moving after several scenes, they getting the boot.