Big ships are slow to turn. One systemic cause based on my experience in old-big companies is that if profit margins on some products are high, mid and some high level managers maximize that product (e.g. roll-to-roll manufactured films in Kodak). With such optimization, you end up at "local-maxima". This continues until you have an "iceberg right ahead" moment when profits start to spiral downward. Depending on the pace of growth of the technology/sales of your competitor(s), this descent is rapid and irreversible.
Big systems also rarely want to kill their "ego". The desire to develop what means your current self will disappear (physical print) is difficult to do. Not in the same way a young group can.