It wasn't a total flop. You just don't know every decent Doom 3 TC.
For instance, now I'm not expert on Doom 3 mods (because, frankly, I monitor open source games) but I still know about the excellent The Dark Mod - a total conversion Thief-inspired game.
I'm sure there's plenty more.
Note quite Elite 4, but a pretty good fan-made successor is Oolite.
The test versions include support for shaders, bringing more modern looking ships to the game.