Interesting. Disregarding for a moment that not all cloud resources supporting tags on all cloud providers (and let's not get started with all the non-cloud stuff Terraform is capable to manage), how does tf know that `stack x` is the thing that's currently running?

By the time the tag has enough information to be useful, you are storing a TF state file in a tag. Anyway, I don't think people complaining about a s3 bucket for tf state actually has experience creating tools like tf.

The parent said he thinks tags aren't the right approach. I wanted to know what he proposes instead.