My *unpopular* Hermes opinion is: it is rude and self-entitled to interrupt a conversation between an SA and a client to help you with YOUR seemingly more important "needs." I used to think this was a popular opinion, but it has now happened to me three times recently while engaged with my SA, so now I am actually wondering. The first time, my SA and I were chatting at my appointment, and this woman stepped forward literally in between us and asked my SA for help. I was like, Hello? I just stared at her dumbfounded that someone could be so clueless and crass. My SA called another SA to help her. The second time, my SA was showing me an item in a side room, and this lady walks over and stands there waiting to be recognized. Thankfully my SA kept her focus on me, and the lady finally walked away and complained she can't get help (to which she was told all SAs were with clients and someone would help her when free). And the third time was more of the same aggravating self-importance.
I realize this can happen in any brand boutique (or any setting, for that matter), but TBH this has not happened to me at Chanel or anyplace else. Must be just my luck. Hopefully there will be less of this impatient, ego-centric culture, and more courtesy and manners.