Firstly, in one Metrolinx proposal, it is possible GO = TTC = UPX for medium distance, like this Metrolinx graph:
I know it is a hugely complex thing....and as I have commented in other threads on these boards it means different things to different people....my comment here was trying to understand how you seem to have (unless I misunderstand your comment/writing style) made the leap that the next step is for GO ReR to operate at TTC fares?
First, let me clarify semantics -- with Fare Integration it may not actually be "Everything operates at TTC fares" but "TTC now operates on the Metrolinx fare zone system". We honestly don't know. More realistically, it will be a hybrid system.
Depends on distance. Just look at the graphs at
Fare Structure Concepts - there are some integration concepts where the graphs say for specific trips GO fares are identical to TTC fares (or "TTC fares are identical to GO fares", but that's just semantics at this stage) in certain circumstances if you look carefully at these Metrolinx proposed options.
Firstly, in one Metrolinx proposal, it is possible GO = TTC = UPX for medium distance, like this Metrolinx graph. I have no idea if they will define Weston as "medium distance". This is unrelated to any opinions I had. This is Metrolinx idea.
In a different Metrolinx proposal, it seems possible GO = TTC = UPX only for subway instead of buses like this other Metrolinx graph, assuming they distinguish local buses from rapid transit subway. This is unrelated to any opinions I had. This is Metrolinx idea, too.
All I can say is to check their
Fare Integration page out for the specific certain situations where it could happen "GO equals TTC" or "TTC equals GO" for some trips (choose your own semantic preference). These are not my opinions. It is
Metrolinx's idea. So back from this red herring semantic distraction and to the million (billion?) dollar question below...
TL;DR: Semantics aside, my point is it's called "Fare Integration" and the UPX is thrown into the "Fare Integration" discussion automatically because they made GO=UPX fare for non-Pearson stations. In other words, people will wonder how Metrolinx(+Toronto) plans to later integrate TTC+GO fares, in light of GO+UPX now being integrated fares.