>>115892334It was 1990 to 1997, anon. Gambit was off the X-Men after the Trial of Gambit story, he got brought back because he was still popular, and popular enough to get his own solo book, but nobody could recapture what made him popular, nor recapture the appeal of his romance with Rogue.
By 2000, Morrison, Casey started their runs, Claremont got a new book, and none of them were using Gambit. He eventually made it into Claremont's book, and from then onwards he was always in B- and C- tier books, never the main book, as the Morrison and Whedon books really defined who were the core X-Men characters for the decade.
It also seemed that a lot of male readers hated Gambit because women liked him, this may have affected his decline into irrelevance.