Thing is, I can also see a non-functional point to be considered. Aesthetics. If you have a particularly nice piece of wood for the body, it looks a little nicer to have fewer "patches" on it. Dunno if it'd matter to me, but it might to some.
I agree totally with this. That's why my favorite design is the Celinder, with the pop-up actually installed in the control cavity cover. That is clean and easy right there IMO!


. And now, she sounds great. This bass was supposedly played outdoors a lot in Puerto Rico, which explains the staining on the fingerboard, and has some bruises, but I think it adds to the MOJO of the bass. It is a very cool instrument.