Learn something new every day. I stand corrected.
Although you seem to be wrong about it being available for 4 or 5 years. Apparently (in the US) it became available in February of last year for Verizon customers and a little later on the AT&T network.
What sucks is that, in order to enable it, you have to pay an additional $20 to $25 per month on top of your data plan.
That's just wrong. My iPhone is in WiFi nearly 100% of the time. This means that the carrier's network almost never has to deliver data to my phone save text messages and, perhaps, notifications. I'd be interesting to find out if it is actually smart enough to use WiFi for messages when available. If it does, then nearly no data goes over the cellular network. I suspect that lots of people fall into the same pattern.
So, carriers charge us for something that is underutilized and then, if we want to simply use the phone as a personal hot-spot we have to pay more!
Maybe I was right after all, in an odd sort of way.
Granted, not an Apple issue after all.
There's plenty more that could have been better with the iPhone 5. For example, why didn't they move picture and video storage to a removable mini/micro/whatever SD card and also enable this as an external file system that could also be accessed when plugged into a USB port?