I worked in the printing industry in general for 50 years. 45 of it in electronic prepress when the first Scitex workstations came into the country. Over time, all of that switched to Photoshop. Add to that (being in prepress), learning Pagemaker, Freehand, InDesign, Illustrator, Quark XPress, whatever else.
We frequently worked with BBDO, Martin Williams, Honda, Target, and I can't even remember how many other high end businesses and ad agencies. I never gave it much thought because that was just the daily routine.
Am I a designer? No, but I worked with them nearly every day. EPS ruled for many years. But virtually all of them stopped using it a minimum of 10 years ago. There's no need for raster EPS when you can just as easily bring a TIF or PSD into InDesign/Quark. There's no need for vector EPS when you can bring a .ai or PDF into InDesign/Quark.
What killed EPS more than anything else? Lack of transparency support.