I doubt it. New CPUs are not going to support LPDDR4 and I highly doubt Apple is willing to make a thinker&heavier machine to cater to a small subset of users.

I doubt it. New CPUs are not going to support LPDDR4 and I highly doubt Apple is willing to make a thinker&heavier machine to cater to a small subset of users. Look at the battery life of XPS 15.