Yes, api versioning would be nice. However, with limited resources (as always) this takes you very far without it. Api versioning also only handles breaking api changes (which this doesn't really protect you from, depending on how the users act to the notification), this also notifies the users to refresh their browsers for hotpatches regarding the frontend, and also regular feature releases. So even if you have api versioning in place, I still see benefits from having this in place