It would be the closest to bypass defederation client-side.
Sounds like there'd be a lot of overlap and confusion..
Not if the client was properly designed. Content ovelap/duplication could be handled by prioritizing one instance over others, and if two accounts have acces to the same instance, there could be a prompt letting you to choose the account to post from or also an option to prioritize accounts.
Ehh... third pic happened to me with a coworker a few years ago. I've never commented on or thought much about her make up, but one day she got to work and her lips were much paler than usual, so I asked her if she was ok and she told me she hadn't put on her makeup yet.
Yeah... in this DIY company I complained to my manager why other deparments didn't create a ticket for requests/incidents for us.
The response was because tickets would cost money to the deparments! What the actual fuck?