I actually did watch the video, and that was the reason for my bracketed "for some tasks" caveat. If you're doing the kind of work at a client site - typically

I actually did watch the video, and that was the reason for my bracketed "for some tasks" caveat. If you're doing the kind of work at a client site - typically the kind of place where wifi would be restricted - where having a second display is useful, you could just ask to borrow an external display: it's in their best interests to find you one if it's going to get the job done faster.