I feel very much like you (and sozap and no doubt many others) do on this topic.
I feel there might only be a few people at this point that understand the impact of these features. Most likely Houdini folk. 
I’ve been trying to implement some Houdini tutorials but not always succeeding (especially not with volumes/grids). To be honest I still find grids fairly confusing.
I have been wondering if it would be cool to create a thread dedicated to the new volume/grid nodes and discover them together? Not unlike the Geometry Nodes mega thread we had in the past that I enjoyed immensely.
Some resources I’ve found that seem to go a bit deeper into the new grids:
Bradley animation channel (has a few on this specific topic now)
3D Singh VFX (usually only promotes his own nodes but this seems to be an exception)
In addition I really like Entegma as a channel which is primarily (but not exclusively) Houdini. He has no recent tutorials on Blender grids but I do hope he will at some point.
I’d like to try to replicate this in Blender for example:
