Really wish people remembered to put USB pass-through on their keyboards though. If I need a small form factor keyboard, it's gonna be a good bet the number of USB ports available is at a premium and chaining will make life so much better. Depending on what I'm doing, I'm going to need the zero latency of a cable (like using my keyboard with FL studio to make some music, for which Bluetooth latency -even the latest gen- is still way too high)
I just upgraded from kinesis advantage to 2 and was bummed they removed the USB ports. My mouse got better wireless connection when plugged into keyboard than into laptop sitting back of desk.
It does when it's also possible to use as a corded keyboard though. I'm not going to use Bluetooth if I have the option to cable (in part because "why would I use wireless when I don't need to" but mostly because I'm also going to use it as a fake piano and even the latest generation of Bluetooth still has unacceptably high latency for virtual instrument feedback)