@Developmentals i'm not hating on him or something like that but i don't think his age barely ever has to do with his bullet performance. if he, cause of his age, was past his prime, at least significantly, over the board, in classical, then i'd think that it would be as well the reason he's not greater than this in bullet. but he don't even seem to get weaker in classical, maybe by a hair, so i think it's same when it comes to bullet.
now i came to main point: i guess you're assuming since bullet's mostly about speed man in his 30s can't be as strong in that time control as in his 20s. but unless you are like 40 i don't think age slowens you in bullet. if that was the case, nihal sarin, praggnanandhaa, etc would be performing better in bullet but apparently they are so far from arguably greatest bullet players like magnus and zhigalko who are 29 and 31, respectively.