Good point.
I also wonder why bearing top disappearing now in competition.
I think there is a kind of gentleman's agreement between players there.
I do not know scoring detail but i think if we put 10pcs bearing top in front and change top 1 by 1,can have more score than 1 top regen style.(Kanta approve it with fixed Koma).
So disappear bearing top is not because of the rule,I think.
Koma community faced similar situation before.I developed bearing Koma,but player does not like it.one is expensive,the other reason is too different what they want to do.It can do more than fixed,but they love fixed tip.
Talking about this year,most of player do not care about score but just have fun and show off their skill in the video,maybe. So no reason why use bearing top and do "normal" tricks.If we have huge prizes or money, the game will change.
So far no force, so player just play what they want to do.The winner get honor, so no reason why they do something to win against their desire.
Jun want to be the winner, so he analyze rule and show regen and bearing koma in 1 routine. Very cleaver routine.
Kanta wants to be a winner but same time he looks want to have fun with Koma in front of people ,natural entertainer.
I am happy to see this year competition.Important thing is they have some message to try to reach to us.
I have respect the player who use bearing top to win,but regeneration is one of the hard core how to having fun with tops as we know.
Use bearing or not can be free choice and we need improve more thing other than categorization.