I have a B450 Tomahawk Max in its box unopened at the moment.
I also have the B450 Gaming Pro Carbon running in my rig right now.
I was thinking about using the max board due to the gaming Pro seemingly crapping out on me but it was in fact the PSU that was DOA... weird as it was a Corsair
I'm now considering selling both boards and getting an x570 to be ready for 4000 series CPUs
My b450 is running great now though. 3600x is boosting between 4350 and 4400 without touching it. All I did was manually adjust ram timings which seems to have given me a boost in performance.