As you know DOOM 3 BFG Edition had some elements from the Original DOOM 3 (2004) removed or altered (mainly in ROE in which they removed a whole map setpiece).
Now with the new Re-Release of DOOM 3 Which is available on XBOX One, PS4, Nintendo Switch and PC (from Bethesda.net) they manage to remove even more things.
Those things (so far) are:
- Multiplayer, even if you use source ports to access the option none of the maps are loading
- Classic DOOM games, I have done