I currently own a couple EM pinball machines (King Pin & Yukon) and enjoy a lot of other EM pins & rifle games owned by friends locally. Cable harnesses are present in any type of game, and while cloth-wrapped wires in older machines are more susceptible to fraying, theoretically the same thing could happen in a modern machine too and lead to more than just a hot solenoid. I imagine the day will come when I have to make a custom cable harness for my custom game... ugh... I might just see if the wire harness manufacturer here locally will do it for cheap.
There is something meditative about cleaning all the switch stacks and various mechanisms that you don't get with SS pins because modern SS pins are so crowded that you're spending most of your time trying to make sure that tiny screw doesn't get stuck somewhere in the wiring harness, which inevitably one or two do. Plus, EMs produce the "chings and dings" you'd expect to hear from a physical game, and present a pretty nice visceral experience.
Also, as a guy who's somewhere between your average pinhead and your average vintage mini/microcomputer collector in terms of electronic skill, it's just not satisfying to replace board after board in SS games, especially when they're hard to source, reproductions are expensive, parts used are obsolete, etc. I prefer finding the root cause of the problem (which probably exists on the one you didn't replace) instead of having x number of MPUs fail on you in the span of a few months, and would rather spend a bunch of hours tracing down the failing $1.50 part than spending hundreds of dollars on a new set of boards (definitely not worth my time, other than my learning!).