I've long been a lover of small-screened laptops, going back many, many years. A 12" PowerBook G4 got me all through college and my first couple years of substitute teaching. After that, when I went into IT work, a 12" ThinkPad X201 was my constant companion. When I went back into teaching, an 11" Air saw me through the first four years of full-time teaching. And this past year, I've been experimenting with different laptops to use to replace the old Air, finally settling on the 12" MacBook. I'd tried using a 13" MacBook Pro, but as space on my desk is at a premium, I much prefer the smallest laptop I can get away with. Plus, the weight of the 12" is lovely in my bag.
I do wish they'd bring it back in some form; I was mildly disappointed to see it go away! I have a 2016 that I'm using for school this year, and a 2017 that I have for my own personal use.