I have a feeling that it will fill a niche, but not be a hugely popular option with most MBP users. Folks can whine about the lack of ports, but in a few years USB-C devices will be quite common and reliable.
For something like ethernet, I'd honestly rather "haul" a small dongle around.
For most people, dongles probably a non issue - you'll get used to it.
But the thing with dongles is that a) you can forget them, b) they can stop working -- and that usually happens at the most inopportune time (in front of a client during an important meeting).
I've killed plenty of the MiniDisplayPort to [VGA/HDMI/DVI] dongles just based on the repetitive flexing where the cable meets the DP plug.
I like the idea a lot (I'm a huge fan of the older unibody MBP chassis), but I wouldn't want to pay $500 just for the privilege of having one.
Though it also has an SD card reader and more battery, neither of which Apple has dongles for.
It basically reverses what Apple is trying to do by exporting everything out into separate devices which makes the machine look pretty in store shelves but a headache to use in the real world.
Also, I don't think Apple actually wants the dongle situation. This is a transitional stage where many existing devices lack USB-C. Apple presumably wants everything to either use USB-C, or be wireless.
95% of people in the "real world" don't plug anything into their laptops except the power cord.
I don't doubt for a second that Apple could capably deliver such a product. The disconnect is that Apple has chosen, for better or worse, to dive in to USB-C as the future "everything" standard. It's one of those things where either this will look like a genius move (on the level of dropping the floppy drive & PS2 ports in the first iMac) or a bone-headed kneecapping of their own product line only with the benefit of hindsight.
Right now, an Android device that has USB-C is one of the most versatile phones available.
https://www.google.com/amp/www.cnx-software.com/2015/08/29/c...