Besides driving manual on hills, I've had to use both feet to creep up oil change ramps.

Or the "drive one way, hold brake, put it in the other gear, add some gas, release brake" trick for getting mildly stuck vehicles unstuck.

That's what the handbrake is for.

I hate that technique, maybe it's a motorcycle instinct to use the foot brake for finer control. But more importantly, the Mercedes I had to two-foot up onto the ramps didn't have a handbrake. My current car has hill assist but I still have to use two feet for backing up sharp hills.