No, not exactly. "the era of sending excess rooftop solar generation to the grid is over" is the OP's statement I disagree with. "They can't take any more solar input", yes they can, by adding more grid battery, which is currently happening.
> Worth noting that there isn't a lot of room for growth of solar that isn't battery-backed. California exports a ton of energy during the bright months. As a practical matter, the era of sending excess rooftop solar generation to the grid is over.
They are referring to the last sentence in the paragraph you referenced.