These days I'm a K.I.S.S. guy when it comes to my stage rig. I'm sure I'd love some of the pedals mentioned previously, but even if I never played cramped stages I'd prefer to stick with one wire running from bass to a single amp/rack/whatever, and speaker cable(s) running from that same box to my speaker(s). Nothing wrong with complicated rigs: huge racks, multiple racks and/or amps, pedalboards, etc. They're just not for me anymore. Usually one tone per gig is enough. For hard rock I like to switch from a clean-ish tone to a grindy tone.
Nobody's saying the dUg amp isn't spendy. However you get a whole buttload of processing power plus 1000W in a single, compact, lightweight box. Assuming the dug will go from a conventional clean-ish tone to Entwistle/Pinnick face-melt and back (and I suspect it will), then I will open my wallet. Convenience is worth $$ to me.