Just curious how many people have snapped or broken these.

Was at a wrecker yesterday looking for tranny mount cores to put my bushings into, and on pretty much every car this mount was snapped right off. I realize these were wrecked cars that were in serious accidents, but... Looks like the passenger side mount likes to snap right at the upper support, too.

Can this mount even be changed with the engine in the car?

Will changing my other 3 mounts place more stress, or less stress on this mount?