Pretty neat work. I was looking at voxels for a while when working on a 3d engine for a side project. There are a lot of very compelling math & performance reasons to go down this path.
That said, I wonder if newer tech like nanite has started to displace these techniques. When you get to a point where you can rasterize triangles that are smaller than a single pixel at interactive frame rates, one starts to wonder what unique advantages voxels still bring to the table.