The well optioned C-bodies do, sometimes (vacuum trunk latch, automatic A/C (which uses an electro/vacuum operated computer (my '70 Chrysler 300/H uses it)), vacuum operated headlight doors and the '71-74 Imperials used vacuum for their electro/vacuum operated ABS (Anti-lock Brake) system (see PDF, below).
To be honest, when I worked at a dealership, we needed those vacuum trees mainly because of damage (engine removal, etc.) or part replacement (replacement engine had none and old engine was sent off without removing correct vacuum tree first (and so on).
You have the versions with or without power brake (the large center one - which later ones used the carburetor for power brakes) then how many other ports. The top picture (post # 5) would be a 7-port tree and yours a 5-port vacuum tree. In almost every case I have seen, from Chrysler, is they always had one or two ports capped off. That is nice because you always had a place to use/attach a vacuum gauge to when tuning an engine.
BudW