It’s going to be hard to come up with a list of things I have forgotten that might be relevant to the DLCs I haven’t played.
That aside, it’s more that I barely remember even many of the main story beats and any characters aside from the top 4.
Edit: Oh, and I remember another thing. My main playthrough was on PC, but I don’t use my PC for gaming so much anymore. I had a decent playthrough on main game on Xbox, but I bought the GOTY edition without realizing that the saves weren’t compatible, or something like that. Hence, my attempts at trying to play through the game.