In the past Adobe’s competition wasn’t as good. Now, the competitors products are just as good. In the past PS competitors lacked features pros needed like PMS spot channels/CMYK/LAB. Not anymore. And Resolve is very compelling in the video realm.
Many of Adobe’s core products have languished at the same time as many of the features that set them apart in the past are become less differentiating. The photo editing/vector drawing space is becoming more commoditized.