15" (2011) never gave me any issue at all. Any neck crane was slight, as you say. However, 15" in the 2016 and up versions are possibly susceptible due to the dimensional thinning they received. Also, I had taken a 13 inch due to 15 being absurdly priced at the time, and am now thinking of probably switching out to an iMac (coming from a 13 instead of a 15). If I am to make any switch, it could be to a proper desktop instead of a 15 inch middling portable.
I am becoming more and more closer to the idea of an iMac and a 12 inch notebook. However, I might have one last trick up my sleeve, that is, if I can get my mother to part with the 24 inch Dell monitor I have given her as a makeshift television, and get her a cheap television instead. That way, the only expense I make is getting a cheap FHD TV (since TV signal is 1080p max anyway here) and a couple of HDMI cables and a USB-C to HDMI adapter/ cable. This will run me down by a maximum of $100.
This would be by far the best thing to do. I need to sneak my monitor back from my mother's room.
And, I am wondering, if I were to do this, I may not need my 13" 2016 at all. I could connect my 2011 MBP with a bad battery - so let's just call it a 1080p iMac machine with 2.4GHz quad core, 6770m 1GB graphics, 16GB RAM and 256GB SSD.
So, could also sell the 13 off and keep the money for a future purchase, burning the 2011 to the ground (risking the flare-up of the graphics chipset in the 2011 by connecting it to an external monitor).
However, that machine is now limited to High Sierra, and I am loving the Mojave betas on my 2016 MBP. So, most likely I will just use this 2016 with the monitor I sneak back from my mother.