Every planetary transmission/differential transmission I’ve seen on here would need some kind of lock for the high-torque mode to actually work. That lock would probably be pneumatics.
So the advantage to the transmissions that you’ve seen here is not that they don’t need pneumatics, it’s that they transition smoothly from one gear to the next. There is no disengaging gears and then reengaging gears. All of the gears stay engaged, you just change the directions of the inputs.
The simple gear-sliding transmissions I think are still better than (although not as cool as) the planetary/differential ones. There are very efficient ways to make a gear-sliding transmission that only involve adding two axles between the motor and the wheel.