I don't think we will see another chopper international medal winner but I do think we will continue to see 2,3 or 4 choppers in the world top100 because it is harder to compete as a chopper but today's young attack players also have less experience against choppers.
The first couple times a looper plays a chopper he will always lose until he has gained some experience.
Especially in the women's field you sometimes see some quite high ranked loopers losing against a chopper because they have not learned to properly play choppers.
Thus I think there will be an equilibrium where we will always have a small single digit number of choppers (of course they are versatile choppers who also can attack like filius) in the top100 because it is hard to compete for choppers but on the other hand more attack players with very little experience against choppers are coming up.
I think chopping is different than jpen because playing choppers has that big familiarity aspect. Playing jpen players is not that difficult (if you are generally skilled enough), big forehand and backhand only punch and block is a style that some shakehand players are playing too, playing such a player is not that different from a good forehand, bad backhand SH player who pivot steps around a lot and doesn't really need that much special training.
But beating a chopper as least takes semi regular practice and match play against choppers and that is an advantage that choppers continue to have as the number of choppers is going down.
But winning titles I think is impossible for a chopper in these days. They can always upset one player (like filius did against lin Jun yu a couple years ago) but winning 5 matches in a row is almost impossible, especially since there are good players who struggle against choppers but also some lower ranked players who are really chopper killers. For example timo boll wasn't a lower ranked player but he basically never lost against choppers, when you face such a player as a chopper you know you are toast.
And in a tournament you might face 1 or 2 attackers who struggle against choppers but also 1 or 2 who are really good against choppers, so winning 5 matches in a row against world class players is almost impossible.
However players like muramatsu, wang yi and filius did have some good seasons in the German bundesliga with clearly positive season records but there also will be days where they basically know before the match that they have zero chance (for example against timo boll in his younger days and probably even now)