Yes, I want thinner even at a cost. The 2015 is heavy. The 2017/2018 model is way better because carrying it is less of a hassle. If it was 1/2 thickness and 1/2 weight that would be ideal.
Also, you give people reason to have more than 1 Apple laptop, one with ports and great keyboard when ultra portability is not necessary, and the other for portability above all.