The latest update to Linden Lab's Sansar comes with event creation, avatar emotes, and sad to say (even Eliot, the Linden staffer writing the update, seems palpably bummed to announce this), the end of the in-game terrain editor:
This is the sad news. We are removing the Terrain Editor in order to improve performance. While we know many creators will be upset by this, in the best interests of making all experiences accessible to as many users as possible, sunsetting the Terrain Editor is the obvious choice. You can still import your own terrain objects created in 3rd party tools.
The Terrain Editor will be disabled as of today, and assets created by it will be replaced after the April release.
I know it’s not ideal. We’re sorry.
If you have used our Terrain Editor to build any of your experiences, we’ll work with you to make this a smooth transition. You can read more in our documentation here.
I'm not surprised by the collective disappointment, because the terrain editor was Sansar's key tool for dynamic, in-game content creation -- a key feature that was fun in itself. (See below.) The mystery is why Linden Lab would remove it to make "all experiences accessible to as many users as possible":
Terrain editing starts at 2:10!
I assume a Sansar experience is inaccessible when the owner is editing the terrain in it? (Double checking on that question with the Lindens now.)
In any case, unless I miss other examples, this means the only social VR platforms with dynamic in-game terrain editing is High Fidelity
and Sinespace. Let me know in comments if I should mention any others!