We don't need more stupid rock, mud, sand, water, hammering, dropping from airplane Youtube videos but I would take more 90K round tests done in TLG style
What we need is for someone to do a failure analysis (FMEA) on the part. Being that it is an HK part, I am certain that it is overbuilt, and the reality is that it is a low stress component compared to the tip of the striker, extractor, ejector, etc. It is also protected from additional stresses by being internal to the slide, unlike a sear in a 1911 which is supporting an exposed hammer, and can be struck by external objects.
Honestly, I would be more concerned about the 1/8" travel of the trigger to make the gun go bang than the striker failing. While I own and really enjoy the VP9, I only carry something with a LEM trigger in the appendix position