I don't recall frames cracking on the 1911s we used before the M9 came along.
Yup, instead of replacing the 1911s when they wore out, they kept rebuiding the rattletraps well beyond their prime.
I don't understand how a beretta frame could break, any abuse that could break a Beretta frame will most certainly ruin a1911 frame as well. The only major part that frequently fails on a beretta is the locking block- they are suppposed to be good for about 10,000 rounds. When they do break, a new locking block only costs about $20 and takes 5 minutes to install. Contrast that to a 1911 where everything needs to be handfitted in order to work properly, or a plastic glock that cannot be repaired.