I have to get a new 4-post USB hub as mine has quit. My current one has a switch and transformer so I can use it as powered or let it get its power from my computer.
I've always used it with its own power switched off for 1.0 or 1.1 USB peripherals (printer, card reader, camera and scanner.) No problem.
I notice that unpowered ones are less expensive than powered ones. Do I need powered ones...is there any real benefit?