Recently, I came home after work; my EDC was my Glock 19, carried in a Blade-Tech IWB probably 20+ years old. In taking off the holster, by unsnapping the grippers, I noticed that one gripper had become unscrewed; fortunately, the component that came off was wedged in my beltline (and I had some extra hardware in the event it was lost). One of the two belt straps was in effect rendered useless...
This reinforced two things to check on my kydex (and other) holsters; 1) that the screws are periodically checked and tightened, and 2) that any rubber straps haven't deteriorated over time, as rubber will do, and replace accordingly.
This isn't meant to be a diatribe against Blade-Tech per se, it's just that both items have occurred with my Blade Tech holsters. Kit checking protocols are a good thing...
Best, Jon