I see. So games using something like Photon are out of luck? Dedicated authoritative servers are mandatory?
It seems like authoritative dedicated servers are out of fashion these days. Especially in the indie scene. But maybe that should change to support more fair multiplayer spaces with less grief from hackers.
GTAO is the most profitable game in the history of games, and it does not use dedicated authoritative servers. Even though they could afford it.
And if you are correct, Valve can’t push this solution. They can’t implement it for developers. Valve is shit out of luck with that approach.