It's not only developers we had a regress in skill in the art/vfx world as well. If there are no tutorials with step by step instructions on youtube most people can't resolve visual/art/vfx problems anymore. It's about the most basic things if you get people with "art" degrees today maybe 3 out of 10 can draw or sketch. If they are not in front of a computer they can't communicate visually. They are also not able to adept or solve problems on the fly which is really important if you supervise on set.