(Author here) S2 is great (and Eric is brilliant). It uses a cube projection underneath. S2 solves some problems I didn't have (equal area, curve filling) but t

(Author here) S2 is great (and Eric is brilliant). It uses a cube projection underneath. S2 solves some problems I didn't have (equal area, curve filling) but the main problem I was looking at was the nonuniform connectivity, and as far as I can tell, it's the same with S2 as if you use a cube directly.