Seems like I misunderstood what tags are for. They're not individual
flags for the play, they're commonly used for excluding/including tasks
at runtime (e.g., `ansible-playbook $PLAYBOOK --tags $TAGS`). When
running a playbook, it will execute all tasks by default.
Think of them as attaching a label and letting the user choose from the
playbook run. Setting multiple tags at the playbook-level seems to be
the best practice as seen from jwflory's Ansible playbooks.
Now, it's becoming similar to my NixOS configuration. Not as declarative
and working out of the box as it requires a server but it's the closest
thing. I'll explore more configurations as I go along.