Tools don't snap when you plunge, everything will want to vibrate when you plunge but not break. They usually break when your aluminium starts extruding, when you accidentally G zero in to the side of the billet and for no reason at all whenever it is most inconvenient. You might expect them to go flying off like rifle bullets heading straight for your eyeballs, but they actually just drop right where they are. It's weird.

Cutting forces are probably greatest when slotting. If you have enough power to snap the tool you cannot use any more.

Of course you hardly need any power at all for rapd transits because there is no cutting force required. You adjust the accelerations/decellerations to allow for the gantry inertia.