I can sympathize with that, but BT devices and software stacks are already out there in huge numbers. It's not even clear to me what BLE is good for, if it can

I can sympathize with that, but BT devices and software stacks are already out there in huge numbers. It's not even clear to me what BLE is good for, if it can't communicate with existing BT devices. USB3 at least didn't make you throw out your USB2 stuff. Is it even possible to buy a BLE keyboard, headphones, etc.? I guess some newer phones support BLE. My old one doesn't, I'm pretty sure.