Not the OP, but I have a 2015 Macbook Pro and a desktop PC both running Linux. I love Fedora, so that's on the desktop, but I followed online recommendations to put Mint on the Macbook and it seems to run very well. However, I did need to install mbpfan (https://github.com/linux-on-mac/mbpfan) to get more sane power options and this package (https://github.com/patjak/facetimehd) to get the camera working. It runs better than Mac OS, but you'll need to really tweak some power settings to get it to the efficiency of the older Mac versions.

I switched to a new x86 machine. Running Linux on Mac just made things unnecessarily complicated and hurt performance. Im still open to using docker on Mac to run Linux containers but once you want a GUI life was simpler when I switched off.