I'm at about 5 gb at the moment, still have 2 weeks left in our month, my son is at about 7 gb, and my niece is at about 2 gb. I watch a lot of Netflix, Hulu and stream music ALL DAY, (my son is a Youtube junky, making, uploading and watching videos all the time). In my area 4G = 17-22mbs, almost all public wifi hot spots (NOT in my home which is still only 10mbs = .7-1.2mbs... Lets do the math. I pay to use this service that I was and still am encouraged by VZW to use, and use often, so I do.
And by the way, if you upgrade ANY smart phone (grandfathered or not), you go to a tiered data plan. Once you are off contract, they have the option to notify you that they do not offer unlimited plans anymore, and then switch you to whatever plan they see fits your average data use for the month, you can't "renew unlimited" now that they don't offer it. If you got it when they offered it still, your good until the end of the term, we were the last to have it.