Can't deny the Argos their Grey Cup success of the last three decades. Despite the small number of teams, it's still hard to repeat especially in an era where so much player movement happens and coaching staffs tend to have less continuity, so they have their work cut out for themselves.
Since
the Eskimos Edmonton won 5 in a row from 1978 to 1982 only the Toronto teams of 1996 and 1997, Montreal 2009 and 2010, and Winnipeg 2019 and 2021 (sandwiching the cancelled 2020 season) have done it. Earlier in "modern" league history there was Winnipeg 1958 and 1959 as well as 1961 and 1962 (all against Hamilton
) and Ottawa in 1968 and 1969.
That's 64 CFL seasons with 7 repeat winners across 17 championships.
But lower success since that powerful Eskie dynasty: 39 seasons, 6 Cup winners among 3 teams.