i'm all for convincing people to go away from 40.

If there is a safer option available we should encourage it.

I think there even out now . . My local model shop is selling or about to sell 4 channel 2.4 gig cheaper than 2 channel 40 sets.

I've sold plenty of 40 stuff on ebay you can recoup most of your costs towards them.
Any new teams should go 2.4 straight away. :-).