I just checked all 4 endpoints in my house. We have written an average of 2500GB per endpoint since the beginning of July. That's not through torrenting or video creation. It's just through regular use, updating playing some video games and so forth. (For the record, temporary/cached file storage for web usage seems to be really a lot heavier than you'd think, as does cache usage for video players when we're streaming videos from the media server.)
We're writers. We don't exactly have demanding requirements for our endpoints. We're not "abnormal" in our usage.
So your whole premise is kind of out the window.