(2) I think the Horizon Worlds problem is not so much that the whole idea is cringe but rather than the authoring tools weren't good enough for users or brands to create interesting worlds. I wanted it to work but I couldn't find worlds I wanted to visit and was strongly alienated by the platform's inability to incorporate JPG images or GLB models. No way I'm going to waste my time learning an awkward interface to make worlds based on dumbed-down computational solid geometry where I can't apply those skills to other platforms.
(3) Part of that problem is that the MQ3 has enough RAM that you can use video game programming techniques to make interesting worlds but very little headroom for user-generated content in systems like Horizon Worlds and VRChat. The 16GB Apple Vision Pro is better but I find it completely comfortable to author for PC VR with a 64GB workstation as much as I love the standalone MQ3 experience.
