What is the difference between CrunchBang and a standard Debian installation with Openbox as the window manager and no desktop environment (which has been my exact my setup for more than 5 years now) ?

From what I see CrunchBang is even less lightweight than my Debian + Openbox setup: for instance it comes with a graphical file manager (I see Thunar on the screenshots) and a lot of other software (graphical IDE, VLC…) that I might never need and would prefer to install on demand when I need them if that ever happens.