There are actually a couple of good reasons to seriously consider a 72mHz synthesizer radio.

The receivers that work with them are available right now range in price from $20 to whatever you want to spend. And you can use the ones you already have, or that might come with an existing plane. And the prices are going to keep coming down as more and more people who have switched over to 2.4 are able to swap out the ones in their existing non-2.4 planes whenever spare 2.4 RX prices come down from their roughly $90 and up.

And with synthesizer radios you're able to fly whenever you want simply by switching the channel.

And prices on synth radios are down since the industry is pushing the 2.4 while it's new and they can get away with full price RXs etc.

And as more and more people shift go to 2.4, the 72 channels have less and less people on them. I used to keep two radios on different frequencies because two other frequent flyers conflicted with my frequencies. They've both gone 2.4. Why should I? beats me. Oh yeah, somebody can still shoot me down. Who?

How long will 72 hang around? How long has AM stuck in there after FM came along as the new safer way. Not entirely the same but it's a close enough analogy.

2.4 is kewl. And makes more sense for a newbie who won't have more than one airplane for awhile. But it's not the only way to go by a long shot.