I just bought a new PowerFlarm and already someone is going to make me neuter it.
The ClearNav display shows all of the GA traffic around me via the Flarm. It is fantastic.
The Dynon Skyview in my Phoenix motorglider has ADSB traffic and now that I have it, I feel naked in any aircraft without a traffic display. There is nothing like seeing traffic on the screen too far away to see, and tracking it into visual range without ever having a surprise visitor scare me.
This new rule came about after one contest trial? You have to be kidding me.
Tactical advantage? If you are not looking out the window you are not going to win.
When the first midair occurs with one or both gliders using stealth mode (or worse - with a multi passenger airplane) because it is mandated do you think there will not be lawsuits against the SSA? Good luck with that one.