@notthesame having a saturn "2d games emulator" running on pi3 is still totally unrealistic. Usage of gles3 is actually there to help with speed so you would end up with only the sh2 improvements over the old yabause, which means an emulator running at 10 fps instead of 5 fps. Don't bother people with pointless things, thanks.
On a sidenote, kronos is now available as an alternative saturn libretro core. It still requires a somehow decent computer (i think a dual 2.8ghz cpu with a gles3/gl3.3 compatible gpu would be able to run this pretty well)