Literature is the only medium besides music that has been in a healthy state for a long time now.

Animation, film and games all gave in to the temptation of commercialization only a few decades in to their existence, becoming trend-driven and losing the ability to have the staying power that works in older mediums can. Once a work in any of these mediums passes the 40 year mark they hit their expiration date and slowly fade out of culture.

Painting and comics on the other hand have both pigeonholed themselves into niche markets where the patrons have very strong opinions on what the medium should be allowed to do, causing both mediums to stagnate heavily.