Proprioceptive overload - if you want a kinesthetic learning experience, try balancing your body evenly on just the lift of air. The tiniest fractions of movement change drag coefficients such that you pitch or roll or yaw. The instructors make sure you don’t barrel roll to your death (video here: https://www.instagram.com/p/B42uZ0_DFDC/). That, and it’s an incredibly fun experience. The day I turned 18 I went skydiving; and I was so fixated on what I needed to do, altimeter checks, body position, that I had fun but wasn’t able to fully enjoy it. With this, you have the time and the directives to learn how the feel should be and just be present.
I think it's cute that so many popular fitness personalities have spent the past 15 years doing exercises on wobble boards, Bosu balls, suspension trainers, airex pads, and wiggle waggle gooble gobble. But what about PURE AIR? Is anything less stable than whipping wind and NO SURFACE. It is a great neural training. And it's super fun.
But on a serious note, you'll generally gain a lot more balance capacity by simply becoming very strong. And maximal strength training requires a stable surface, not an unstable one. Balance training is indeed beneficial. But don't get distracted by all the gimmicky variations of exercise out there. They're fun, but totally incomplete without stable surface most of the time. And if you wanted maximal instability, you'd just train on thin air all the time.