Seriously? You're going to buy one of these $29 adapters to be able to use your old charging cables? That would mean that you'd either have to buy an adapter for every cable -- at which point you might as well just buy new Lightning cables -- or you're going to have to carry the adapter with you everywhere. Then just carry the damn Lightning cable!
Whoever is complaining about this should look to all other the battery powered phones in history. I lost count of how many times Ericsson phones changed charger types. I went through 3 Ericssons before they became Sony-Ericsson and all 3 had a different charger (and I had accessories for each i.e. Texting keyboard, car charger, etc). Then BlackBerry, I think I went through 3 cable changes in 4 years. Samsung? Aren't there like 9 different connector types?
Apple changes the Dock connector once after a decade because soon the phones will be smaller than the connector and people freak out? Your phones still work with your dock connector. It still works with the dock connector today just as much as it did when you bought it. If you want a
new phone, then you'll have to ....erm..,
...
Adapt.