Kind of agree with the OP. I joined the wonderful wacky world of ED at Xmas just gone, paying the princely sum of £5 for the base game. Almost immediately I found half the missions on the BBS couldn't be accomplished as they required planetside landings...only possible in Horizons. Of course the game didn't actually point this out in a clear fashion, just a cryptic FFE style bug message that it couldn't render the graphics. Extra £10 sorted the issue but it did occur to me if the base game has Horizons as a dependency it would surely make more sense to bundle it all together. Most other AAA games by the time they get to the age of ED are on sale as a GOTY or similar version which includes all the add-ons/DLC to date.