Existing examples and development start:
- Dwarf Fortress - 2002
- Cataclysm DDA - 2010
- Caves of Qud - 2010
Rendering can get well ahead of the zoom level so that everyone gets a full-screen full-framerate fractal zoom as if they had all of that compute in the room with them.
“Firecracker containers” for macOS, based on Apple’s Virtualization framework.