After our first league night with quite a few beginner players my friend who has all DMD games said to me that he didn't think everyone would have as much fun playing his games than they did playing mine. He said that the EM games are easier to learn and understand than his modern DMD games and felt that most of our new players might be intimidated by them.
I got into EM's by accident. I bought one to gut it and turn it into a virtual pinball. I ended up loading the virtual version of that game (Aztec) on my computer and played it and liked it so much that I spent a year trying to find another project machine so I could get it playing again.
What I like about them is they ARE pinball. Skill AND luck. It seems modern pinball design is all about predictable shots and if the ball has any sort of random return to the flippers then it's bad design. They seem to try to take all the luck out of them. Modern pinball seems to be more about skill and knowledge and if you don't know all the rules you can't compete at the same level as someone with the same skill and more game knowledge.
I'll always have EM's in my lineup and I'll NEVER sell my ACD.