Rear Camber Arm + Trailing Arm Bush

[string]

I know this and know a solid bush restricts movement compared to a OEM bush. I know it restricts movement to X and Y as opposed to X, Y , Z planes.

The OEM bushing provides stiffness where it is meant to be stiff, and compliance where movement is required.
The ES bushing provides little compliance everywhere except in the single axis that it requires stiffness. What do you think happens when you try to twist the centre shaft (i.e. not push/pull). BINDING. Jack up the rear of your car and draw me a side view picture of what the centre shaft does relative to the casing. If you agree that it does not stay centred the entire travel then you are agreeing that the polyeurethane is either binding or providing compliance where it shouldn't be.

I also only hear real world examples thru multiple driving situations and they have never "binded" - run dry of lube and squeaked alittle , but never binded or produced sudden change in suspension characteristics.

Are these the same people who swear by it? How do they know their bushings aren't binding? How do they know that their RTA bush isn't binding causing unnatural deflection in other rear bushings to compensate for the lack of compliance where needed. There is no hard and fast rule that says a binding bushing will cause instant 360 spins. Everything makes a subtle difference, and steering feel and the linearity of it's response is where the OEM bushing shines.

Please , as requested before find a real life example or two of "binding" - via honda-tech or whatever. Its for all our benefit

See above.