Blow up one piston, shame on Stihl. Blow up two pistons, shame on me. Blow up three pistons...?

[Paragon Builder]

The dull chain is very overlooked as a cause.

Agreed. I see a lot of it. Guys seem to think it's easier to just yank on the saw instead of sharpening or switching chains. A lot of heat is generated and you see scoring on the clutch side of the exhaust if you catch it before the whole piston goes. A sharp chain let's the saw work instead of you. And your AV will last a lot longer as well.