The Sabres averaged 100 points a year from 1974-75 through 1983-84.
For the first 5-6 years of that period they had the French Connection and a killer #2 line with Danny Gare, Don Luce and Craig Ramsay and lots of forward depth. Some good d-men in Jim Schoenfeld, Jerry Korab, Bill Hajt, Jocelyn Guevremont but the dynasty teams had Ken Dryden, Billy Smith and Bernie Parent tending the nets and the Sabres didn't. Also, Scotty Bowman, Fred Shero, and Al Albour were just better than the guys Buffalo had behind the bench for the 70's, at least.
In 1975, after downing Dryden and Montreal they arguably outplayed the Flyers in the Finals but fragile journeyman Gerry Desjardins and sickly Roger Crozier were no match for Parent on one of the great goaltending runs ever. The Islanders had their number in 1976 and 1977 again with goaltending a deciding factor (Billy Smith) . Don Edwards was promoted as a young guy but Parent and the Flyers took them out in 1978. After a first round upset in a best of three to the Pens the next year, Bowman was brought in.
He remade the team basically gutting the entire core (not a bad idea--too many playoff failures), save Perreault and Edwards, after a great year in 79-80 but another loss to the nemesis Islanders in the playoffs. Edwards was a decent #1 but not a Stanley Cup netminder. The young new talent took awhile to mesh but Buffalo was right there as a 100-point team for the next while as guys like Mike Foligno, Phil Housley, Tom Barrasso, Dave Andreychuk were added in exchange for vets (maybe at too rapid a pace) but things never really broke to where they could legitimately challenge the now dynastic Islanders. The young talent was really too young to win in the early 80's.
My Best-Carey