does anyone currently use or has ever inthe past chose to use two overlapping tuning 4's (1 BEAD and 1 EADG) over one 5? and if so why?
Money. And availability of unlined fretlesses. I already have two four-stringers. Converting one to BEAD was the price of a set of strings and a few minutes with a nut file. Getting a fiver to my specs (which is the end goal) would be a couple grand.
I usually only take the BEAD out these days anyway.