You want to treat any space hogging the same way you treat tail latency. Not as p50, but as p999. So the question is not "how many people are inconvenienced on

You want to treat any space hogging the same way you treat tail latency. Not as p50, but as p999. So the question is not "how many people are inconvenienced on average?" but "how many people are inconvenienced during peak times?" If the second figure is non-insignificant, you have a problem. Gamers and UX designers understand this. ANY latency peaks or waiting time hikes are detrimental.