> if you have more than 2 screens, because of kids, it will add up

I download and seed hundreds of GB's a month of torrents and run a couple cryptocurrency nodes in a household of 4 where everyone uses youtube, netflix, and spotify often and we've broken 1TB once in a decade..

Meanwhile, some roommates and I hit 1TB in a week in a 4 person household. After quickly switching to an unlimited plan, some data accounting showed almost 80% of that came from the three game consoles playing online (fast connection = you're always the host in Destiny 2 apparently).

What I'm saying is YMMV. I bet you'd see different results if one or two of your housemates turned on 4K on youtube/netflix.

I'm not too convinced.

Let's assume we devote 70% of the 1TB cap to streaming (netflix, youtube, etc.). This leaves 300GB for anything else, which be more than enough. Using netfilx's highest bitrate for 1080p, we get 268 hours of content for 700 GB. At the highest bitrate for 720p, we get 518 hours of content. Dividing that by 30 days, we get 8.9 and 17.3 hours per day for 1080p and 720p respectively. 8.9 hours split among two screens (one for kids and one for adults) might be tight if they don't have anything else to do, but 17.3 hours sounds more than enough if the kids are in school and the adults are employed full-time.

Blowing through 1 terabyte in a month sounds pretty difficult. You have to do lot of steaming to use that much.