Yes, there are other servers but the thing that made Nostalrius stick over others was quality. Other private servers emulate the vanilla WoW experience well, but not with the consistency or commitment that Nostalrius had. Even though I only lightly dabbled in WoW private servers (and played on Nost on more than a few occasions) it definitely is sad to see that Blizzard is shutting it down. While Blizzard is pretty adamant in their claims that launching their own legacy servers wouldn't be very worthwhile, hopefully, Nostalrious (or other quality private servers) will cause them to cave at some point and see that there is a decent market for it.