Michael, believe me I understand the physics of it. The problem I see on the hills is certainly partially related to the trainer, but it is every hill on Zwift, the same (almost exact) drop in speed occurs. My wife and I were going to ride together once and she sped away from me and I could not catch her, that doesn’t happen in real life.
I am certainly not knocking Zwift, I think it is awesome, but I think we need some adjustability to make it feel/act more like we would see in the real world, especially since that is kind of the point.
I I don’t have the answer, unfortunately. But I am hoping the smart trainers get us a lot closer
As a side note, using my Tacx fortius I could climb 9-11% hills at about 6-7 mph, but I had the resistance driving to push harder. I don’t think the fluid trainer generates enough resistance to push me that hard and I don’t force myself to do it.