I'm the type of fella that doesn't like to have and sync multiple computers. I like to have one machine I can use on the go and plug into a monitor when at the office. Simpler and less expensive that way. Currently I run on a recently purchased 13" rMBP, which definitely got some competition from the rMP during the purchasing process. I do work in some ridiculously sized database files, and a little graphic design, as well as being a chronic multitasker (10+ apps open at most times). I knew I couldn't spring for the rMB this time around because I have a coworker running a 2014 MBA (doing similar work as me) whose machine handles his workload, but gets hung up with some things. There's no way the rMB would keep up. My goodness, I love the size and design of the rMB. I probably could have gotten away with buying a 2015 Air (with 8GB RAM) over my Pro, but it was just too dated and didn't have the retina screen. I've come to the conclusion that a rMB won't be realistic for me until it is on par with the current MBA in terms of performance. At what point does the rMB have the ability to become your only machine?