Re: 12 round limit, saved lives?
The original purpose of the change from 15 rounds to 12 rounds was to fit a championship fight into a hour on home TV (CBS, NBC, ABC etc)
12 x 3 mins plus 11 mins for rest periods = 47 mins
Add the prefight & post fight wrap-up equals an hour.
15 x 3, plus 14 mins for rest periods = 59 mins
No time for anything else.