Originally Posted by merlinextraligh

Like there were never any problems with Square taper cranks. Aluminum crank arms will fail over time where the arm attaches to the steel spindle, with the hole in the crank arm enlarging, particularly if the crank is ridden with the fixing bolt just a bit loose.

Old square taper internal BB's had an advantage with friction, over modern external sealed bearing bb's, but I don't think many people would maintain that square taper is a superior interface for attaching a crank arm to a bb spindle.