I worked with X3D (the successor to VRML) and, yeah, it was primarily used for these weird low quality experiences that could best be described as "Second Life

I worked with X3D (the successor to VRML) and, yeah, it was primarily used for these weird low quality experiences that could best be described as "Second Life but worse". So, if that, an open standard that did basically the same thing, didn't go anywhere, I can't imagine that Facebook's "metaverse" will either.