They should have learned a lesson from Second Life. It was so much graphically better, more sophisticated and immersive even in 2d .
Users had a world where they could build, interact, buy land, make, buy, sell items and art, go to concerts, have virtual sex, attend classes, build a castle , explore, etc, etc. It would have been awesome in 3d.
This was like 20 years ago! Meta had such an opportunity there but instead had half avatars and chat rooms. It sucked.