So what ever happened to Ryze?

Did he die as far as most players are concerned? Lose viability? Get boring? Did he pull a Voldemort and now we aren't even supposed to speak of Ryze? Because if so, then now woupd be a bad time to mention I wanted to try Ryze out. But if we aren't supposed to speak of Ryze, then I'll just go woth something else.

Seriously though, Ryze? Viable? Worth it? Just wondering. Thanks.