I’m fortunate enough to grandfathered in on an unlimited-data plan with Verizon. I’ve bought devices at full price to maintain the old plan, because I really do use it.
Besides the obvious need for my work at Automattic, I stream all of my entertainment via either an Apple TV or a Google Chromecast. I’ve peaked at usage of 175 GB in a month, and 60-75 GB isn’t uncommon (between two people especially).
With the tether at my disposal, why wouldn’t I abuse my tether?