telephonedude98 wrote:
what's something good about the Powerbook G4 that the retina does not have?
The PowerBook G4 does have a FireWire port, which some music devices may require. clintonfrombirmingham already covered that; if you have any FireWire devices you'll need an adapter to the Retina's Thunderbolt port. But the PowerBook G4 is so old that there's really nothing on it that's better than a MacBook Pro Retina. I have a PowerBook G4, which I love, but it is utterly outclassed by all Mac and PC laptops today. The last PowerBook G4 came off the assembly line in 2006.
If you are seeing a lot of DJs use PowerBook G4s, it means one of two things: It's a demonstration that so little power is needed to play back audio that a slow old G4 can do it (which is true, since it's easy to build a cheap music player that plays back great-sounding music), or maybe some of those laptops that you think are G4s are really MacBook Pros. The early MacBook Pros had the same aluminum keyboard as the PowerBooks and look nearly identical.