I’m not sure if you’re joking or you’re thinking of a different type of “metric.”
The metrics I think you’re referring to are the ones you collect throughout your product, which I think the article author would advocate you continue to collect and expand.
The “metrics” the article references is more actively tracking and referring to them in your workflow. So, tracking and acting on changes to conversion rate. If you “expire” them, you don’t stop collecting them, you just take them off your dashboard for now.
The metrics I think you’re referring to are the ones you collect throughout your product, which I think the article author would advocate you continue to collect and expand.
The “metrics” the article references is more actively tracking and referring to them in your workflow. So, tracking and acting on changes to conversion rate. If you “expire” them, you don’t stop collecting them, you just take them off your dashboard for now.