When are they going to replace SteamVR with OpenXR runtime? Valve are one of the major backers of OpenXR, yet their SteamVR still uses their pre OpenXR, so call

When are they going to replace SteamVR with OpenXR runtime? Valve are one of the major backers of OpenXR, yet their SteamVR still uses their pre OpenXR, so called "OpenVR" API.