My employer purchased a CP4 for me to mess around with, and wow is this thing fast! File transfers are at least twice as fast. It’s hard to tell how much quicker it is since the progress window disappears almost immediately. I haven’t thrown any large programs at it yet to see how it handles, but I’m keeping my CP3 racked above it just in case. And then there’s the poor NI-3100 I need but once a year.