I was disappointed by that too. I didn't think it would be hard to keep track of the pogo adapter for my x3, but I did end up losing it pretty quickly.

I really didn't want to buy the x4 pro, but I'm working on custom firmware for the x4 and I want to make sure it's compatible with the new device. Also, the lack of light was kind of annoying when I took the x4 on a camping trip. Not $100 worth annoying, but mildly annoying.