For 2.92 we want to enable NanoVDB by default in Cycles. The implementation is available {rB3df90de6c226}, but disabled by default.
[x] Windows precompiled libraries (rBL62507)
[X] macOS precompiled libraries (rBL62506)
[X] Linux precompiled libraries (rBL62505)
[X] Linux install deps (rB716b7a60df36)
[ ] Enable by default in CMake
Potential features to add:
[ ] Half float support for grids to reduce memory usage further