It's incredible how Apple make it's users happy to lock-in in their eco-system.
I don't really know Apple eco-system but it seems weird to migrate from tierce app (already well integrated) like Bitwarden to keychain.
I've lost count of the people who have switched from their Music App to Apple Music for no reason other than "it's Apple".
Apple make good hardware and their eco-system seem amazing too, but people should see the advantages to be not entirely depedent from a company.