I have my theories, but what are your theories on why Apple didn't include (1) the extension AC power cable and (2) at least an USB-C <> USB adapter? The extension cable does make carrying the tbMBP around a bit more bulky, but it's not like the MBP line is a featherweight to begin with. I think it's a large oversight to not even package a USB-C <> USB adapter if you're going to introduce a new port standard. I can't imagine removing these two items from their non-competitively priced machines would really break their bank. Sure, they're out to make profit, but that's not the only dimension to consider.