You can have a roller clutch fail due to a driveline failure, and still function well enough to get you to the starting line after repairing the rear, driveshaft or whatever. Then when you shock it, it completely fails and the RPM spike as the engine freewheels. If you are not quick enough getting your foot out of it, at some point the drum speed reaches sufficient RPMs (2.45 or whatever low gear you're using x engine RPM) for the stock drum to disintegrate.

Beyond that, with the power levels being produced by the AH cars and other combinations, the Torqueflites are seeing higher torque loads than ever. I believe in that application LBA is mandatory simply because the capacity of the roller clutch is likely being exceeded. Engine torque is nearly doubled by the converter and then multiplied some more by the planetaries. If someone knows the real torque rating of one, I'd like to know.