In what way is it different? They increased the character limit? It's still a short form reddit-style message board, same as it was 3 years ago.
What makes the reddit style more similar to Twitter than to bulletin board, in your mind? And do we have a modern example of the bulletinBB style since phpBB?
Hacker news is reddit style, too (by far the closest of those listed). Somethingawful is an example of a BulletinBB style board in 2026.