I'll take your word for it, but I thought that at least as far back as 2002 it was required that the breaker for a MWBC trip both sides if one trips. I really

I'll take your word for it, but I thought that at least as far back as 2002 it was required that the breaker for a MWBC trip both sides if one trips. I really don't like MWBCs myself, if I would've known the electrician for my house was going to utilize a bunch of them, I'd have happily paid him not to do that.