You have data to back up your claim that “Vision Pro owners are using it often multiple hours a day? That’s a shrinking tiny fraction of AVP buyers based on my experience. I’ve been in the industry for a decade. I have an AVP, know many other owners and devs with published apps. I’m myself the dev of moonrider: most popular WebXR application so see the industry numbers.
Also sales /= usage and retention. Engagement is what you need to grow a platform.
Your numbers about XBox sales might be true for a brief period of time between Quest2 and Quest3 releases. Still what matters is engagement and retention.
As mentioned only product-market (albeit niche) fit for VR has been some games subgenres. Can you point to any other applications with significant numbers?