I don’t think there’s a c/datahoarder. But that was exactly what the reddit community was called.

The person you’re arguing with is likely running a private ‘netflix’ instance using Jellyfin or Plex. It’s not my cuppa, but I think I have every episode of every season of Below Deck, Love Island, and Bachelor/Bachelorette on my instance.

You start running out of space pretty quickly when a dozen people are using it for their daily media consumption.