It's been a while since I was in this boat financially and I don't know if there are any phone plans where there is a data package that's offered that's less than an unlimited data plan on the network, but once upon a time over a decade ago I delayed switching from my grandfathered plan to an unlimited one. My plan was cheaper, and I'd supplement the data with WiFi at school and free networks (didn't even have wifi at home; was at the mercy of neighbors not knowing how to put passwords on their wifi). This change would've been bad for me. And I imagine the ones that will be impacted the most are the poorest among us, if they use it. Hopefully there are enough open networks around so that those negatively impacted have other areas they frequent where they can connect.