Reply To: Bas mitzvahs

Not having read Rav Moshe’s tshuva, I would hazard a guess that the cause of his objection was that it was initiated by Mordechai Kaplan, an Orthodox rabbi who founded Reconstructionist Judaism. 90 years later, noone remembers this so it is no longer viewed as copying their minhag. The real key is making the bar mitzvah as inexpensive as the bas mitzvah, not the other way around