ORIGINAL: Robotech
Like many who have posted here I have not "upgraded" yet but expect I will in the near future as it becomes necessary.
One item I have to take issue with in several posts is using ignition noise as a reason to switch over. Using 2.4GHz to mask or hide a faulty ignition or a poor installation is just plain silly.
Shielding is much more effective for 2.4ghz as it it is for 72mhz. It does not eliminate the ignition noise problem but it makes it much more manageable. As to it being silly I guess is in the eye of the beholder.