Baton Pass is being discussed/looked at again in the generations where it's still legal to some extent. Namely gen 2, 3 and 5 OU. Mostly with focus on gen 3 because it also sours the ladder experience there.

https://www.smogon.com/forums/threads/baton-pass-v12.3679625/

Renewed discussion mostly stemming from this SPL replay: https://replay.pokemonshowdown.com/smogtours-gen3ou-546028