I suspect 1Password sees features like iCloud Keychain coming and is trying to grow into other markets because a "good enough" built-in password manager will significantly decrease their value proposition in the consumer space.

Not great if you like their product as a consumer, but 1Password's biggest feature differentiator right now is better family sharing than iOS provides. That could easily change in a future iOS version, and then it's suddenly a lot harder for 1Password to grow by selling a $60/year password manager subscription.

Enterprise features on the other hand, that's not something that OS vendors are likely to ship.

While I don't like the newer versions of Dropbox as much as the old ones, I can understand how pressure from iCloud and OneDrive pushed them toward enterprise features over consumer users.