“many people who started at HIR will no longer daven there”
I daven there for two main reasons:
1) It is the closest shul to my house that has both weekday and Shabat minyans.
2) The Shabat services have more singing and are not as rushed as at the the other shuls, with less talking. (One very frum visitor came on a Shabat and said half-jokingly that there was so little talking that he wasn’t sure that it was an orthodox shul.)