Ms. Critique: I’ve read all their (Rav Arush’s and Brody’s) books, and I’ve read Rav Brody’s blog for years, and they’ve never said a negative word about the MO, or said anything about being charedi rather than MO. In fact, Rav Brody periodically features MO musicians or other people. When he toured the US recently, he even spoke to non-Jews and at non-Orthodox shuls (apparently got a heter from R’ Ovadia Yosef). Although their own community is charedi, they’ve made it clear what’s important is not how you dress or what Orthodox shul you go to.
Charedim are destined to be the vast majority of Orthodox Jews because of the birthrate, but that doesn’t mean MO is doomed. Also, what is charedi and MO will change with time. For example, there’s apparently a growing phenomenon of “post-charedim” or moderate charedim who may look charedi but don’t buy into all the beliefs and practices — daas torah, for example. And many MO are becoming more stringent without necessarily wearing a black hat.