Thanks Paul! OneSparse author here, we're still in early dev stages (OneSparse requires some new features in postgres that won't be available until pg18) but my plan is to do a benchmark shootout with various graph tool for postgres. Initial results look good, on my 4-core 11th gen intel laptop we're getting some really good numbers!
Orkut was as big as I could go due to limited RAM. One of my constrains is limited access to big enough hardware to do the kinds of Graphs Of Unusual Size (billions of edges, trillions of triangles) where we can really flex the scale that CUDA support gives us. Stay tuned!