I have come to the conclusion that if you are going to be working in a high dynamic range (camera raw or scene linear) get ready for some colour management gymnastics.
You are never going to be in the right colourspace for all tasks.
Helpful Videos on Color
I think this is where ACES can be helpful. Imagine trying to get all of your camera raw into a common colour space without it!
It feels way harder than it should because we are not used to doing this much gymnastics. Convert all footage to scene linear for blur and maths compositing. Bring it back to log for tracking and grain. Back to linear and then somersault and land nicely in rec.709 for delivery.