I have had the tip of the striker break off. I run a $uarez NP3 striker now. Because I wanted NP3, not because I lack confidence in the OEM striker.
Like @
Lost River all the parts I swap out have the OEM parts residing in a plastic organizer so I have spares and can quickly go back to OEM. I just got a screaming deal on a Supermatch NP3 slide, so now my parts kit includes a G17 Gen4 MOS slide assembly, assembled. Or it will as soon as I order my lower 1/4 cowitness FO sights from Dawson.
A more interesting break I repaired this year was on a 2 pin Gen 2 G19. Gun was a working gun for almost 30 years, no armorer maintenance, tens of thousands of rounds. A couple of Pat Rogers agency contract pistol courses. Anyway, the Chief during quals was getting repetitive "clicks" instead of bangs on the line, so I deadlined his gun. The extension on the top of the trigger bar had worn down to the point that it was't able to consistently lift the striker block up high enough to allow the striker to fall.
Rebuilt the side assembly in 20 minutes, as the moving parts were pretty battered. Replaced the triggerbar, and for good feelings, the pins and trigger housing.
pat