The world still isn't ready for a machine with only USB-C/thunderbolt-3. The aren't docks good enough with the right features or port combinations. The myriad of USB-C adaptors is only barely in place, some positions in that market have only one or two options without the depth of a mature market. USB-C/thunderbolt-3 _could be_ great, it could be the greatest docking connector yet, but until the right dock exists I shouldn't get a new MBP because I have a dozen legacy devices on my desk to connect. And everyone should hold off on the 12" Macbook until the next revision when it gets thunderbolt-3.