I have a prepaid phone, because I don't want to spend $hundreds/month on an unlimited data plan that I'm only rarely going to use. But $20/month for unlimited

I have a prepaid phone, because I don't want to spend $hundreds/month on an unlimited data plan that I'm only rarely going to use. But $20/month for unlimited data in my car? That would be worth it just for the 3-4 road trips I take each year. My kid could sit in the back watching numberphile videos the whole time? Yes plz.