Have you tried shattering glass with a leatherman? I haven’t, but I know shattering glass isn’t that easy.

Let say you upside down. Have you tried cutting a seatbelt under tension without any play against your body. Hook/safety style seatbelt cutters can be used safely. A folder creates stab and slice hazards.

Can you reach you tools easily after a collision? Belt/pocket carry is not the same as having the proper tools mounted on the right place in your car.

A lifehammer or resqme is cheap, high effective, if mounted correctly; easy to reach, find and cannot be forgotten.