Lockpicking lawyer's hydrolic bolt cutter exploded on it.
Angle grinders will cut through anything, but they're loud, and if you have a lock that takes more than 30 seconds to grind or 1 grinder disk, well why would the thief bother vs one of the easier targets?
PS, get the chain versions and not the ulock if possible, in test videos I watched it seemed like the chain versions were much more annoying for the angle grinder user. Look at how long it takes this guy, and in reality the chain isn't going to be on a nice platform like that https://youtu.be/uZdCNRcSkCk