I do not see 72 mHz going away anytime soon. This is a good thing. I recently got a Spektrum Module for my 10x, and am now going to put my CH24 9C on that auction site to fund more planes. I was using the 9C up until last week.

(OT on the abbreviations like mHz, gHz, W for Watts, m for meter etc. The rule on which letters get capitalized is that Hertz, and Watt were persons, meter is not.)