Aggressiveness of position hold in PosHold mode

I’m curious what parameters control how aggressively the flight controller will try to maintain position in Brake or PosHold mode.

Is it a combination of ANGLE_MAX, PHLD_BRAKE_ANGLE, PHLD_BRAKE_RATE, MOT_BAT_CURR_MAX, MOT_SLEW_UP_TIME and maybe some others? Or is there some overall limitation in terms of aggressiveness? (Also, do PHLD_BRAKE_ANGLE and PHLD_BRAKE_RATE apply to “Brake” mode?)

Is it possible to tune it as aggressively as the DJI “emergency brake”?

Do not use pos hold. Use loiter instead. You have more parameters to play with in loiter. And yes it can break very fast.