When I bought mine after some consideration last year it was the only laptop with a 16:10 screen, IPS panel, better than 1080p resolution, 16GB of ram, faster than SATA SSD, good battery life, light, decent keyboard, just all around a great device, the only missing option I would have liked hardware wise is a matte panel instead of glossy.
Alternatives I considered at the time were the Dell XPS 13 Dev and Lenovo 450s/440s which both were 16:9 and with less than 16GB of ram. I think there are still no other comparable options that come with a 16:10 screen out there even today.
OSX is not my OS of choice (it's still a lot better than having to run Windows) but battery life and scaling is worse on Linux, also if you do your development using Vagrant and Docker the OS is not much of an issue.