>>1858283pretty much any motorcycle will balence itself all the way down to like 5mph hands off if you just sit still on it
thats nothing impressive at all
biycycles are the same but just more twitchy due to the low weigt most importantly the wheels (why all no balence normies all ride heavy as fuck 20ich electric fatbikes now)
i think it could be a cool thing to have on a mountain bike though if it provides solid stability through rough stuff especially if that includes low speed stability