Here is an answer from a pro colorist / editor. It will give you a perspective and a cool tip how to edit any footage on a not very powerful computer.
https://www.youtube.com/watch?v=olvTKnLJCJc
https://www.youtube.com/watch?v=lTes9KkwmME
According to another of his videos, 12K BRAW is so well optimized that it can play without a problem on a Macbook Pro 2017
https://www.youtube.com/watch?v=0ShXVTiGD80