I don't see why people can't just remain in their own cabin. People moving around inflight in general is annoying. We all need to do the basics - use the loo, etc. - but extraneous wandering between cabins is a nuisance to the crew and other passengers.

My wife and I travel in separate cabins a lot. (If you've ever noticed vastly different search results when you search 1F vs 2F across an entire alliance, you know why.) We've never failed to locate each other in the gate area upon arrival.