Indeed it doesnt, but it is way less sensitive for interference, and that for me is a good thing.

For me its main selling point is that the receiver will only respond to the TX with the bound GUID, and discards the others as noise.

And since the amount of data being transmitted is not that much, you can cover a great distance.

In the UK they held RC boat races not so long ago, and loads of people there use spektrums. Most have said they wouldnt want to go back to their old systems, but there are known issues with very dry weather for instance. Now that is something both the UK and Holland usually have no problem with.

Even so, in robotic competitions i dont see us use more then 20 robots at the same time, so in my opinion how many TXs you can use at the same time seems a bit of a mute point to me.

I would however recommend turning the transmitters in with Transmitter control, so we keep the amount of active TXs in check. No sense in using more channels then is absolutely necessary.