It's so frustrating. I was tentatively looking forward to the revivsion of the Retina MBPs, expecting (hoping) for a more flexible solution than the 2013-15 series. Hah. This is after waiting for an update to the 17" in 2012 when I grabbed one new off ebay after I missed out on the refurbs. After upgrades, that was/is a fabulous machine, apart from the non retina display, that I've been happily using since, while debating the merits of a 1TB 15" with discrete graphics.
After missing out several refurb opportunities, they finally reappeared on the Aus refurb store and I jumped, even though with our dollar crash it's 50% more than my fully specced 17" was in 2012, but with 50% more BenchMark (and USB3/TB2).
The screen is great, no idiotic TouchBar, ESC key, largely bulletproof and repairable keyboard, MagSafe, big battery, sensible touchpad and upgradeable drive. Too bad they didn't stick a couple of TB3 ports on it - and the battery actually runs for hours on regular apps, unlike the 17" that maybe gets an hour even though it's 90% + capacity.
Maybe the mid 2015 with discrete graphics is still the best choice till they actually make a pro laptop again, especially since it can run multiple resolutions (including a non scaled 2880x1800) and a 5K screen @60Hz).
They must still be building some of these to test response since there's no way new ones could still be available in the real world.
That's interesting. But, yea, I'd consider a 2015 MBP (or 2013 Mac Pro) if it weren't for it being TB2 and my concern over Apple removing TB2 support for eGPUs. I hope Apple has something to show in June. New MBPs that fix some of the issues and/or a reasonable Mac Mini upgrade.