I honestly was thinking they're already kinda dying, or at least soon to die because unless manufacturers make a proper use of the bass DD, they don't get much hype, aren't a compelling buy and probably don't make a lot of sales.

Although, now that I think about it, they maybe are relevant whenever crin's "project red" drops, and i guess moondrop, kz and other brands still haven't gotten their hands In a 2DD setup, so who knows.