nixos-rebuild: why is --update-input and --recreate-lock-file deprecated?

[MoltenMonster]

It's very convenient to specify either of those flags in system.autoUpgrade to regularly update my flake.lock file.

warning: '--recreate-lock-file' is deprecated and will be removed in a future version; use 'nix flake update' instead.

warning: '--update-input' is a deprecated alias for 'flake update' and will be removed in a future version.

[edolstra]

I agree that those flags should not be removed, and there is no reason to remove them..