1.25 TB is more than enough for my family that streams content in 1080 and downloads/plays games on Steam. In December we hit almost 1TB because we installed a BUNCH of games and had holiday guests. I got the warning and lowered our streaming resolution to 720 and we're hovering at an average of 600 for the last 2 months. 1.7, 1.2, and 1.0 for one person? That's not even close to normal.

Here in California, and with Cox specifically, we've had (soft) data caps for at least 15 years. They weren't enforced at first, but gradually they did and in 2017 they started charging for going over. For a long time I was using the lowest tier (tiers were based on speed and data limits) because even their tier 1 had decent speed and they weren't enforcing the data caps so I saved a considerable amount of money doing this.