I can understand the need for an isolated power supply, like any voodoo lab unit, or a one spot which is a very cost effective solution. However if a power supply brick isn't isolated, what's the point if it's all drawing from the same power source? Isn't it essentially a one spot that wastes pedalboard space? What's worse is supplies like the mxr dc brick only run like 700 mah despite having so many slots and an 18v. A one spot has at least 1700mah of potential power to draw. You'll never use those slots up before you start running out of power to draw on the dc brick. I don't mean this as a knock on those products if they do serve a purpose but they come off as quite inefficient as far as I can see.