I apologize… I should have been more clear.
Bitwarden in general is as usable on Android as any password manager. (I haven’t seen any that aren’t clumsy compared to desktop, but that says more about Android than the password managers.) It’s one of the few password managers with an extension that works on mobile Firefox.
My comment was specifically in regard to the web vault; my point about the app was only that since there are some things the app can’t do, the existence of the app doesn’t make the usability of the web vault irrelevant.
Sharing is an important use case for me, because I’m trying to find a password manager that will enable my partner to access my logins should I become incapacitated, yet will be dead simple enough that I can actually get her to use it. (If she doesn’t use it all the time, she won’t remember how to use it in an emergency.) I agree that needing to share on mobile isn’t likely to be common; I just happened to stumble on this. When I saw this was a recent, new version of the web vault, I thought it had to be a regression — that it just happened that no one during the “beta” phase tried it on Android.