copy/paste thoughts from elsewhere:
Well, some thoughts on the new MBP now that it's had time to settle in a bit:
I really don't mind the 4 USB-C / Thunderbolt 3 setup. I think it makes sense for a pro machine - they have massive bandwidth extremely versatile ports. The only device I use with a non-removeable USB-A cable is my mouse and using something like
https://www.amazon.com/dp/B015Z7XE0A/ is pretty simple. I assume there will be some USB-C adapter with magenetic ends ala
https://www.znaps.net so there's magsafe back essentially (and the cable is just a standard USB-C so easy to replace). I would have liked the SD port to stay, but I can grab photos directly from my Camera when tethered, though it's not as quick. The rest is just picking up some USB-C to A/B/lightning cables and keeping my old ones for charging from van/wall outlets/etc. Not having to flip my cables all the time when I plug them in is worth buying some new ones.
Ok - so we're built for an awesome docking environment (not my thing, but whatever, it's not donglegate). The emphasis on light / slim / longer battery life feels misplaced. It makes sense on phones, tablets, and airs, but what pro generally needs to work untethered for 10 hours? If they put in a GeForce 1060 (~2.5x as powerful, more power hungry), and had the option for 32GB of DDR4 RAM battery life would have dropped a bit, but they could have beefed up the battery a bit to compensate, or been happy with 7-8 hours. It'd still be smaller than the 2015 rMBP, perhaps the same weight or marginally lighter, and feel much more like a "pro" machine. It feels a bit too compromised for edge use cases - "It's so light to carry between your docking stations!" /shrug
eGPU a bit of a PITA (and you never have full bandwidth) and honestly that's my main bottleneck now. My 2011 is chugging along fine - my old i7 CPU does what I need, my eSATA SSD is fast enough, my 8GB (can expand to 16GB for $90) of DDR3 is fine for what I do (if I'm getting soldered RAM for a machine that'll last me for another 5 years I'd prefer 32GB). Lightroom doesn't recognize my GPU which is unpleasant, and obviously I'm compromised on modern gaming, but day to day use is fine. The new screen looks amazing, and the touch bar seems... neat. I don't use that top bar aside from volume control anyways, so it's a win but not super amazing.
Debating whether to keep my preordered 15" in or not actually - I imagine there might be a spring/summer refresh with Kirby Lake (not a huge deal), 32GB of RAM as an option, perhaps some kinks worked out of the touch bar.