Day trading? Sharing memos with office-bound personnel?
I haven't worked in an office for many years, at least before everyone had a PC on their desk. What I see now is that most folks are at a desk with eyes on a screen. That can be done as easily in an RV as in a building.
Maybe these folks that work on the road are all Dr's. The number one medical device in every Hospital and Clinic is a laptop computer. If I have to spend time in a Hospital again, I'm sneaking down to the Morgue and grabbing an unused wrist band. Mine was scanned for everything encountered with my care. The bill was just a series of UPC numbers.