the club which have a lot of achievement on 1980-1990 currently very difficult could repeat they achievement again because most of them for now have financial problem and on modern football money is almost everything because good players usually is very expensive and each teams require good talented players which could help them to get the trophy
I would add to your arguments that St. Etienne is lucky to had and always has Ruffier who is for me on of the best goal in Ligue 1.