I think this will finally push me off of my current AT&T plan.
I've been keeping a grandfathered unlimited plan with a corp discount for $72 a month or so.
I JUST renewed my 2 year contract, because I was still able to get the phone subsidy of roughly $450.
When looking at other plans, it just didn't make sense to change, because my $72 was really $72 - ($450/24) = $53 per month. Additionally, I was even able to get a few $100 account credits for "retention". My 5s was completely free for that reason.
Some people don't think you need to upgrade a phone every 2 years, but I do, and here's why:
(a) Battery life goes to crap after 2-3 years
(b) Mobile cpu's are exploding in power - the 6s cpu compared to the 6 cpu, for example, was 70-80% faster
(c) I work in tech, and usually need to test on the latest devices
I'm rarely using my full 5gb of "unlimited", but my usage has been creeping up, and any other plan was still around $50 for 5gb.
Without the $450 subsidy though, there's absolutely no point to stay on an individual plan. I'll probably join a family plan with my mom/brother/sister and try to get my rate down to $40/month or so.
The NEXT plan is an absolute scam, because not only is the discount negligible (maybe $100 off the phone vs $450), but you also don't get to resell you for (usually $200-$250) - you have to trade it in.
The real pain point for me next time around will be paying the $750+tax for a new iPhone. I will probably try to keep my 6s for 3 years given the new state of things. As Androids get more powerful, it may ultimately push me to a $300-$400 android model like the Nexus 5x currently. I strongly prefer iOS, though.