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Whether it's FTL, Worm Holes as in Stargate or Spatial Rifts, who cares.
I'd care. I do want the ME universe to still feel somewhat unique, consistent with what was established before and most importantly feel like Mass Effect. The way star travel works is a vital part of it.
Mind you, I wouldn't mind if we had a new way to travel (and I don't expect Andromeda to have the same relays as the Milky Way, in fact, that would be odd and in need of its own explanation). But I am saying that this is a vital part of the lore, which to me is very important, so I don't consider "Who cares?" a good attitude towards this kind of thing.