We have the business setup, for our department we have several collections that have some shared secrets, as well as that our users use SSO login of various kinds to multiple sites.
It is more important between a personal vault and websites than it is to shared collections.
So - when browser plugin the system asks “Do you want to save?” - it should also provide an option to Link it to an existing one, that way when you update/change a password, it automatically updates that object as well (if write access available), and you dont have to have tons of the same stored for different sites.