When does 'lav-first' make more sense than a compromised boom?

Hey everyone, as an editor, I often receive tracks where the boom is clearly the intended primary source, but sometimes the lav feels like it should have been the hero. The textbook always preaches boom-first for natural sound, and I totally get that. I'm currently cutting a short film, mostly shot on an ALEXA Mini, and there are a few scenes (particularly one with a character walking through a bustling market) where the boom is fighting reflections and background noise, while a hidden lav on the talent is surprisingly clean despite the commotion. I've tried EQing the boom to death but the lav just sounds better. What specific on-set scenarios have you DPs or sound recordists found it genuinely necessary to prioritize a well-placed lavalier over what would have been a very compromised boom track? I’m looking for actual production examples, not just theoretical situations.