I should maybe clarify what I mean by this. Plenty of cards are not welcome at a lot of tables, but not because they're too /good/. A lot of the cards on the banlist are great examples of this idea. https://twitter.com/thespikefeeders/status/1248353333661839361

When the cEDH community talks about what's competitive and what isn't, they're usually talking about the predictable meta that shakes out when everyone is optimizing and nothing is considered off-limits.

If you define casual to mean socially acceptable or considerate, competitive is not the opposite.