Yeah there are definitely things that rely on a specific version of a given doom port. If you ever hear Decino (or others) talk about something in a level being

Yeah there are definitely things that rely on a specific version of a given doom port. If you ever hear Decino (or others) talk about something in a level being specific to "GZDoom", they mean exactly this - some functionality wouldn't work in the original Doom engine, often some simple scripting