For static terrain (and maybe even modifiable terrain) I would buy that. But for characters, and props, and architecture, and details, not so much.
The C4 engine built a pretty good voxel-based terrain system a few years back, and it’s still going strong. Voxels are great for plains/tunnels/caves/hills/whatever. But the processing and memory required when you need to sculpt specific details “off axis” make them not well suited to details, or things that animate. Triangles meshes will be cheaper for a long time.