I remember before eso said that mer could only live 200 years, I read up that mer could live 500-1000 years. so why did eso change this? If Im correct there is an npc in Skyrim who was alive during the red year, which was 200 years ago, which means that according to eso she will die soon despite looking rather healthy. I just don't know why zenimax online would change this. I cant see how it would affect anything.

Because fake stuff is fake.

I would have to bring in a Dunmer like Neloth to that argument against that. He was there in to see the Nerevarine and he also there to see the Dragonborn. Now, it's not too far past the two hundred year marker, but truly, the guy should be on his death bed in the Dragonborn DLC.