I've been illustrating children's books for over 20 years. I started out doing traditional watercolor illustrations but when I found how great the color reproduction was with digital (PhotoShop) art and how much easier it was to make changes/corrections I convinced my then publisher that we should use it. And that's what I've been doing for a long time.
When you have steady work it's easy to get in a rut and not experiment or change the way you do things because it's been working so far and it's comfortable–that's what happened to me. A couple years ago I had the amazing opportunity to write and illustrate my own 20 story Bible storybook. It took me only a year and a half to complete. A miracle, considering all the work that had to go into it. But during that time I wasn't able to keep up with my clients illustration work and of course, they had to find someone else to do it. Also during this time children's publishing was going through some major changes with sales dropping and publishers going out of business, etc. When I returned to illustrating full time the work was no longer there.
Time for a new look. Recently I've been researching PhotoShop painting techniques online and even took a brush-up Adobe Illustrator class. It's been fun trying new styles and learning new things. I guess old dogs can learn new tricks! Now it's time to pray that publishers also like what I've learned. And of course, that they like the new stories I've written.