Should championship fights go back to 15 rounds?

[beenKOed]

I think so but the reason they were dropped still remains. Economics not safety and the overriding problem today would be the fact that 80% of the fighters today could not fight 15. Entire training regiments would have to be changed. Half of the elites today are gassed by round 6.

I wonder how much time is actually devoted to stamina/endurance/cardio training by the boxers of today.

Do they spend most of their time in the gym and do "a little running here and there" and underestimating its importance?

Good question for 'Ask the Trainer'. I suspect they try to get the cardio differently these days.