My English sucks so it will be very short - I'm not good at lamenting in foreign languages :D
OSR is not dead and probably nothing can change it. 5e cannot change it and any other "big game" cannot change it. Reason (in my opinion) is simple - big games are made for cash, while most of OSR products are made for fun. While it's highly possible that one day RPGs will be no longer profitable, I don't believe that one day there will be no one to game. At least until we're alive. Period.
|This is big game|