Oculus Quest wasn't the first commercial HMD with inside-out tracking.
Windows Mixed Reality headsets came out October 2018 with inside-out tracking. Oculus Quest came out May 2019.
The Vive technically could do camera passthrough, but I never saw anything actually supporting it well and it wasn't very high quality at all. The Vive Pro which also released before the Quest even had two cameras for stereoscopic passthrough.
Windows Mixed Reality headsets came out October 2018 with inside-out tracking. Oculus Quest came out May 2019.
The Vive technically could do camera passthrough, but I never saw anything actually supporting it well and it wasn't very high quality at all. The Vive Pro which also released before the Quest even had two cameras for stereoscopic passthrough.