I don't think ..... ( I know bad idea) ���� that the flies of today are getting more complicated, jus it seems better materials ,, now I do believe they are getting smaller,, 1950's-1960's-1970's vs today , I can't even see a size 20 let alone tie one .. Lol,,, an competition fishing is so fAr away , from a guy like me , that catches trees, an a fish now an again