Should championship fights go back to 15 rounds?

[Sleepwalker]

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?