2016 2TB PCIE in a late 2014 MBPr 15"?

[BoneDaddy]

Would that work fine?

I'd like to see about upgrading to 2 TB, on board.

 

[Patcell]

I don't believe it would be possible to take a 2TB drive from a 2016 model and put it into any other logic board. The SSDs in the 2016/2017 pros (w/ touch bar at least) are soldered to the board.