Yes, it is. Consider a large house with an 8-person family (two grandparents, two parents, four children of varying ages 12-18) and it would be pretty easy to have at least one 4K stream active 16-24 hours per day every day.
And that's strictly looking at active engagement, not even 'somebody leaves Blue Planet II running in the background because they find it soothing'.
Ahh yes, the typical 8 person household!
"Untypical" is not the same thing as "unreasonable". For many people who aren't you, an extended family living in one house is a normal course of affairs.
My household is 5 right up until any family come to visit, and then we'll be 7+ for potentially 2+ weeks
I mean he’s paying for two lines. So make it two four person households.
This is upload, not download.
Okay, so make that a handful of college students sharing a rented house (on a single lease, not separate units): they're all hugely into video games and want to be professional streamers one day, and they all have very different schedules, so for most of most days at least one of them at a time is streaming in 4K to a Twitch channel.
Then why does Spectrum sell a consumer service that allows users to do that?
4k tv and 4k cameras are consumer grade devices. With 8k or 16k, maybe, but even those are consumer grade devices.