Do you honestly think they are not going to? It's not good business to hit users with surprise overages or other fees. In my personal experience, VZW has never operated that way.
If VZW ever kicks the remaining folks off unlimited (I have serious doubts), I guarantee they will email, text, call and snail mail you multiple times well in advance of the change date.
Every time this subject comes up, people make-up and imagine these ridiculous scenarios VZW has rarely, if ever, demonstrated a potential to commit. And they use those crazy ideas to gin-up hate and just bash VZW.
This particular subject has basically become a way of trolling this forum. I'm not saying anyone is doing that, but after 3+ years of these unfounded, unproven rumors that never came to fruition it's time to put this subject in the troll category until there's actually something factual and verifiable to discuss.
I personally agree with you. Except for the singular case of unlimited international roaming data, Verizon has always grandfathered people, letting natural attrition take care of the rest. After all these years, there are still people who are grandfathered into America's Choice, even though Verizon did away with it so people couldn't use MOU for data and have to pay per MB. Very, very few people would be willing, let alone afford to pay a 150-200 percent markup on a handset.
Using myself and my five lines as an example, upgrading all 5 lines at full retail every 2 years will cost me about $2000 more (or $1000 a year) versus using subsidized upgrades. With our data usage, and the fact that I am getting the $20 per line Talk Text and Data discount, I am saving about $100 a month (or $2400 over a 2 year contract period) versus switching to Share Everything. That makes up the difference between subsidized and full retail right there. And of course, there is no law saying that I have to replace my handset every two years. For every month that I put off getting a new handset, that just increases the savings. While we still got subsidized upgrades, it made sense to take advantage of subsidized upgrades whenever possible since we had no plans on leaving Verizon anyways. Now that there is no incentive for replacing a phone, other than the desire to get the latest and greatest, I can put off getting a new handset unless either our handsets die, the technology becomes obsolete, or there is a handset that comes out that we "have to have". And the longer we wait, the greater the savings (ignoring the peace of not worrying about overages).