Yaaaaaaay, yet another thread about when another IM client will be out! Try the search button next time, it'll do you loads of good...
This is what I pulled up in 30 seconds with just the term "msn":
https://forums.macrumors.com/threads/527373/
https://forums.macrumors.com/threads/519033/
https://forums.macrumors.com/threads/516167/
https://forums.macrumors.com/threads/515167/