Will a Featured Game Mode ever stay for good? :(

I am aware that the point of a featured game mode is to be something new that comes along to "freshen up the game", something smaller and enjoyable, but not as resource heavy as something like Dominion, TT, or ARAM. That's fine and all, and I do enjoy the rotation aspect of it, but honestly, while some of these modes are fun little experiments to play maybe once or twice or maybe a few times with some friends (Hexakill, Doom Bots...eh), others seem like they have a ton more "staying power" (ex: One for All, URF) and would only serve to make the game a lot more enjoyable overall by providing more options for relaxed play in between Normals and Ranked games.

So, my question to Riot (even though I probably already know the unfortunate answer), will we ever see a Featured Game Mode come and stay for good? And no, I don't mean rotate back in only to rotate out in two weeks. When I say stay for good, I mean stay for good, permanently.