Fox becoming far more prominent in recent times is, I submit, a direct result of the popularity of the 20XX meme/mindset. It used to be that Hungrybox loved the Fox matchup, and Armada as well, but now that they are being beaten and outplayed by Mango and Leffen, they have copped out and basically johned by complaining about and/or switching to Fox (for some matchups, in Armada's case. They simply say "what can I do, it's Fox" instead of saying what they used to say: "How can I better outplay and read my opponent to beat Fox?" The 20XX meme has spawned a degenerative trend in smash, where players feel it is a legitimate excuse to blame their character. What has happened since some players have switched to Fox? Hax has basically maintained the same level, just outside of top level, and Armada still can't beat Leffen. People saying that Fox is unbeatable are just lazy, and their laziness is validated by the widespread acceptance of the 20XX meme. I'm more and more hearing character johns and complaining from players, and I'm less and less seeing them actually improve. If people just accepted that all characters and players have weaknesses and the best players are the ones who know how to expose and abuse those weaknesses, we'd be far better off. And no, I am not trying to argue that Fox and Falco aren't the best, or that everyone is viable, or any other such exaggeration. All I'm saying is that if you play a top 8 character, stop complaining. If you play a lower character and can't find success, maybe that character isn't for you. But look what comes of a good mindset and a great player, even with a sub-par character: aMSa emerges, Axe emerges, Plup, Darrell, Abate, Eddy Mexico, and Shroomed all emerge. They come not from their characters but from fundamental skill, practice, knowledge, and a good mindset.
tl;dr No johns, 20XX is only damaging as an idea, get better.