surviva - I agree and disagree. I agree that this is VERY important. Knowing your ranges at all times is key for sure, and helps play close to GTO in many spots.

I disagree that this should necessarily fall into an advantage of having a low 3b. I think this should fall into an advantage of "knowing your ranges", regardless of whether it's a result of a low 3b or a high 3b.

Suppose now I have a high 3b. All this means is that if I cold call now and the flop comes Jxx, I'm pretty sure that QJ is near the top of my range for calling down, whereas before I would have had many more KQ and some AQ even. So I will need to adjust my call down ranges accordingly.