I would say no. I get it's not out, but every single PF board I have ever seen has always been prone to vibration and more cracked solder joints.

Given that, and the fact that all the drivers are down in that area, unless they have a system for completely isolating the electronics from ANY vibration whatsoever, you will get less reliability is my guess.

Still, it's a guess with merit. All PF boards are much more prone to vibration issues, and as such, that makes them more prone to having problems. So in answering the ops question, based on historical issues with PF side boards, and that the new MMr has these, and the old one did not, that is a sound assumption at this time, is it not?

Or course I'm guessing. Rick is guessing too, no matter what tests he's done. Once it's put in play, on a serious routed location like the PHOF that exposes stern cc'ing with a vengeance, then we'll see, but that was the op's question, all answers are guessing, at least mine has a basis for the philosophy behind it.

I had a girlfriend when I was younger and we liked to bang at her place a lot. Her mother caught us once, and she wasn't happy. Even then I realized that things that bang and things that don't like the banging do not work well together.

I don't believe this. There are shit loads of issues with sterns that never would have made it out the door with b/w. Popeye was one game that suffered from poor qc, and it shows, but there are countless issues with sterns, something as common as orbits that never seem to be consistent at making it back to the flipper properly.