I have an email from one of Artscroll’s publishers which, effectively, says that only stories/biographies/cookbooks are selling nowadays. If you look, even books like Nishmas by Sruli Besser which one might think is a learned commentary, is largely stories.
I will say that I find Koren is publishing quality material and while Ktav was sort of out of it for a few years, it seems they’re once again publishing quality books as well.