Corner Violence is my passion.
The outgoing Rifty(and the Polygons i’ve seen lately) are built a little too light in the rear end for the forces you can put into the frames with well tuned suspension and a rider dedicated to utmost lateral brutality.
Mine always break at the cross braces in the cs first(torsion fatigue) and at the same time the driveside chainstay detaches itself from the forged chainstay yoke.
I’m better at spotting the cracks in the shockstay before catastrophic failure, I just order replacements when the spiderweb paint cracks start.
Fwiw, I haven’t had any catastrophic chainstay failures since i stuffed my DBIL aircan full of spacers!