There are now for 2016 a whole slew of thinner, faster ultrabooks with more ports, abd equal or better screens than the rmb. while i like mine and it does all i need it to do, it's dated and getting more dated by the day. apple's gonna have to do a whole lotta updating and refining to make it compete in the marketplace with the new sleek breed of windows machines. at te moment they are getting away with robbery charging $1299 and more for the outdated rmb.
Sounds like you think the one port is the result of some kind of limitation, but it's a clear design decision on Apples part.
It's not going to have more ports in the next update, but I bet they're actively figuring out a way to give it less ports (headphone jack, I'm looking at you).
It's not dated, it's futuristic. Too futuristic for some, just like when the SuperDrive got eliminated. Buy whatever laptop makes you feel like you made the right choice, but this is just what the MacBook is. Plenty of other options.