s,t,r goes out of order (alphabetically), whereas u,v,w does not. For that reason I prefer u,v,w. Especially in the IDL and autocomplete where they will appear as rAddressMode, sAddressMode, tAddressMode (z, x, y).

• s,t,r: Metal, OpenGL
• u,v,w: D3D12, Vulkan

cc #73