No one asked for it because only people who make “metaverse experiences” like “Spotify Island” and “Elapse seconds on empty baseplate” and “Disapearings Blocks Colors Disappear Fun 3D Race” are allowed to post feature requests on the devforum, and most people who WOULD use cel shading probably dont even think to ask for it, or they dont think roblox is a good enough game engine (because it isn’t) to have cel shading