I want to add that I'm happy about the success of 5e, because, while I found it's not my favorite edition if we count PF and far from my favorite RPG, it's a good game, I play it happily when I get the opportunity.
The best part of it that it is a very good game for beginners, easy to learn, easy to play and GMing, friendly to everyone regardless of age, sex, etc. And the zeitgeist helps it, so I'm applauding it's huge contribution to the spreading of the hobby. It's a great springboard. However I'm mostly laughing at the burrying of other games, because 5e in the end is not for everyone on the long term. People might want more depth, more elaboration, more simulation. Or, on the contrary more story-gaming style. Or different genres, different settings. In fact I think it's good for the other games, because more beginners means more potential players who, after some 5e experience might find to want something different. So it's a tide, that's rising all ships.
But it doesn't make it the best game, or anything. It makes it just a good introductory product with the widest brand-recognition, nothing more, nothing less. It's the most mainstream right now, but most mainstrem != best.