Oh yeah, I forgot, there is a way to get all 8 companions at once. You weren't supposed to be able to have more than 2 at once, but there were some oversights that allow you to bypass this. One of them is that, under the right conditions, Fawkes will join
you even if your roster is already full. For details, look
Well, finding and exploiting bugs is part of the Fallout experience. How many FO3 players went, on a subsequent play through, and got the "unbreakable" Gauss Rifle, or picked up unlimited copies of Sydney's SMG? The answer is that most of us who played
this game over and over eventually exploited many of the game's glitches, though I would imagine that most of us played through at least once without doing so.