Hi all, Curious about experiences and theoretical considerations regarding fatigue or other deterioration issues with pawlonia cores and epoxy laminates of these. This construction technique has been around a few years now, and it seems there are boards from 2010 still going strong.

Assuming there have not been:
cracks that let water in,
collision with solid objects,
excessive UV exposure,
140kg dudes landing flat from great heights,

just regular usage with protection from the elements in between,

Will these materials break down?

Is mechanical fatigue an issue?

What's the oldest/most used wood-core twintip you have that's still going well?

Are there signs - visible or in the feel of the board - that indicate it's losing integrity?