Carlsen’s achievement is great, but one of the reasons why other players are not so strong in rapid and blitz is that the incentives are not quite there. Rapid and blitz usually pay much less and are not as promoted at the top level.
Of course. All players are more incentivised to play classic format more and better. The fact that he has dominated for some time allowed him to draw more attention to other formats (and even online bullet). He’s that competitive.