

It was never alive to begin with. The Metaverse exists as nothing more than a buzzword made popular by Zuckerberg/Meta. There are no technologies, standards, devices or software driving it. Nobody even agrees on what features it should have.
And on top of that, old pre-buzzword stuff like SecondLife or PlaystationHome are still closer to a “Metaverse” than any of the more recent buzzword filled attempts.
Peak Firefox was back in 2010/2011, almost 14 years ago, it has been steadily dropping market share ever since. This is not a new problem by any stretch.