Sounds like you baby it and maintain it so really no reason to randomly go pop. If something catastrophic really did fail it doesn't sound like it's through any fault of your own.
My friend's g37 left him stranded twice. First time the coolant hose popped off, white smoke behind him, and the car stopped entirely and wouldn't crank. Second time, the other hose popped off, big plume of white smoke everywhere, and the car basically stopped cold. Both times the fix was easy. The first time he hit the accelerator hard and it happened when the car down shifted. Second time, just cruising on the highway.
This is why I asked grey or white smoke since they can look similar.
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Had a 2010 WRX- boy was it quick in a straight line, got a 2014 Z- man is she grippy in the corners-- then left the Z and later got a GTI, now back in an 09 racecar Z!
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