The problem with this statement is that there is a vast difference in number of users between Ello and Google+. The latter is far from "forgotten" or "near dead." Every time I hit G+, it's teeming with activity. I can't say that about Ello, which seems to be populated by mustachioed German font designers who love custom bicycles and the music of Kraftwerk.
Now, Google+ has had its issues. It might even be going away or abandonware. And it's a blip on the radar compared to Facebook. But that's different from comparing it to Ello! The "Google+ is dead" meme is just lazy tech reportage.