As a frequent user of IMDB to research movies and TV show episodes, I can’t say I ever saw anything productive on the boards. I was not an active commenter, but I would occasionally scroll through certain boards and rarely did I ever see anything constructive. Nearly every thread I ever encountered was discussing how attractive one member of a cast was or where you could find nudes of a certain cast member, etc. I found the actual reviews to be more useful, and those are still there. I cannot say I am sad to see the message boards disappear.