This is a good question. I really do love the way Sterns play, they're packed with interesting rulesets.
The problem is when they don't play, however common and rare this may be going forward remains to be seen. When it happens though, it's a royal PITA with no real way to fix it like the old days. This would not be such a large concern if they were either easily repairable, or these node boards cost $50 a piece like they should. Then you could easily justify picking up a spare or two for peace of mind.
I've played several games on this now, with no issues whatsoever (yes, everything tested and working correctly)
Pinball is a good time and right now it's hotter than ever. What's unfortunate is, it's a shame that Stern took advantage of us, and left behind a near bulletproof design in Sam and cost-cut their way to more profits by converting over their entire line to a very unproven and fragile ''the pin'' style of game- All this while they already pulled a fast one with premium/LE vs pro features and pricing, and jack the prices $200 every other release.
It begs the question, why? You're giving us less and less and you want more and more?
I totally understand and get it, they're a business out to make as much as they can, but don't ask me to pay $219 to fix your problems on top of what I already paid, that's just not right.
I can't say going forward that I feel safe, but I can say I'd feel pretty foolish spending $5600 on a pro that can break with no way to repair it other than to spend hundreds more for a potentially minor issue.