There are a number of consumers of namespaces, particularly of late, but they've been around (depending on which type) for years at this point, and many users (

There are a number of consumers of namespaces, particularly of late, but they've been around (depending on which type) for years at this point, and many users (or even admins) have little knowledge of their existence or usage unless it comes time to deploy $CONTAINER and their platform does not have them enabled.