Either way, most endgame activities move along with the game. Nightfall is one of them. The endgame progresses as the game expands. Whoever bought and just stayed with Vanilla Destiny, already hit the endgame when the new stuff came out. Now your endgame is done. Meaning no point to playing the game anymore. I will say, TTK is a great expansion and the story is now here. Lots to do and has been lots of fun. After 12 hours, I am still working on questlines, haven't hit max light level and haven't don't the crucible part yet. So much content and now a lot of fun finding more powerful stuff. It's kinda like borderlands now. Constantly finding new stuff. This expansion is getting great reviews vs when Destiny came out last year. It was low 70's last year and now hit 88. Def been worth the $40 I paid.