I think the reason to drop 17" back then was that there was no powerful hardware to run retina on 17" as that would be too many pixels to handle. I got 15" rMBP in 2012 not out of a desire but necessity as the 17" was dropped.
Was I happy about it? No way. 15" rMBP is not a very good product in my eyes.
Yes, its light and portable. Yes the screen looks beautiful but its still effectively 1440x900 which is a joke (lets be honest here). If you increase the resolution to something higher then you get slight blur and suddenly the retina loses all the purpose.
Fast forward to 2016 we now have the hardware to run 1920x1200 as the old 17" MBP was which was great working resolution for most people (prosumers or professionals). 17" was just the best laptop one could get when needing to work on the road or need something portable from one office to another. 15" brings so many compromises that its just not that very good product for me (and many others).
YES, the majority of people will go for 13 or 15 because majority of people are ok with that. Apple could have 17" as BTO online only and we would all be very happy.
To be honest I sometimes kinda wish that Apple would flop with the iPhone for few years so they go back and treat the computers with the love some people would appreciate. Its great to have amazing iPhone but at the end of the day I do my work on a computer and I would wish for Apple to invest some love there. There is no need to dissect consumers from prosumers or professionals. They can cater all if they wanted. Their line up is a mess but its all on the low side. 11,12,13,15 - so as some suggested - make a compromise Apple - 12, 14, 16. Its still not 17 but it would be a good step.
OR
12, 14, 17 and we are all happy. Its the massive bezel that needs redesign. Physical space will remain almost identical so there is really no excuse there.
release 17" and I'm getting rid off this ******** 15" rMBP and will buy the 17" the moment its out.
Most people here don't care and don't understand but the demand for 17" is still there and will be there. Even if that means low numbers.
So instead of giving us more band options for iWatch give us both. Work and pleasure can come in both
