I ve been inviting people to try SL (opensimulator, the open source version of SL) and most people actually like 3D worlds. Many people don't even know these things exist because their mainstream experience is mobile games and flat websites. But SL has a terrible user interface and experience and it's so complicated that it alienates those users. Even an advanced user would have a hard time figuring out all those legacy things and concepts, it's the Unix of VR worlds.

As for the metaverse, people need to realize that it's not for everyone . Maybe in 10-20 years or so