There are a number of different toll lane systems.
The article is talking ONLY about one of them which is the L A Metro Express Lanes. One system, in one location, which is the Metro Express lanes on the 110 and now just this week, the 10.
I do not believe that applies to ANY OTHER SYSTEM.
Thus, if you are on the Toll Roads in O C or any of the Bay Area systems, you still need the transponder. And for bridges, you must pay the toll.
In any case I still need the transponder for my car.