The Thunderbolt adapter is $30. USB adapters are even cheaper. Given how rarely I find myself actually using Ethernet on my MBP, I'm perfectly happy to trade off the need for a dongle for a laptop half as thick as it would have to be to fit an internal Ethernet port.
So what's the distinction between a "Pro" model and the normal model then? I thought that was the point of having a "pro" lineup, was so serious work could be done and normal consumers would be steered towards the Air or MacBook line....
The Pro line offers considerably beefier processors and graphics chipsets, and more memory, than the Air or just-plain-MacBook lines do.
I don't know what kind of very serious work you're talking about that can't be done at all with less than 150Mbps symmetric, not even for a minute - but in a decade and a half in this industry, I have yet to meet anyone who does it. So I'm willing to surmise that it's a very serious niche specialty, whatever it is.
You'll probably have to sink considerable money into whatever laptop you want to do this kind of very serious work on, but you'll be happy to know that Thunderbolt 2 can handily support 10Gbps, and such interfaces are readily available. Of course, they come at a premium price, but you're getting paid well enough for your very serious work that that doesn't pose you a major problem, I'm sure.
Right, at home on a 30mpbs/5uo internet connection? Or in an office with a business class symmetric fiber at 150mbps with no busting or shaping? There isn't enough wireless spectrum available in USA for more than 5-10 people in a 50yd radius to get full bandwidth. And the backhaul to wireless APs is 1gig, so not only are you splitting airtime, you're splitting wiretime.
