I don't find myself ever going over on my phone, you could probably limit it pretty easily or have notifications warn you of it beforehand.
In fact I think that laptops with data plans might already be a thing? Either way, this could definitely be practical for some travelers, especially on the road I'd think.
Man, that would be a pain... As soon as you go over.. Auto-Renewal!
I don't find myself ever going over on my phone, you could probably limit it pretty easily or have notifications warn you of it beforehand. In fact I think that laptops with data plans might already be a thing? Either way, this could definitely be practical for some travelers, especially on the road I'd think.