I think mechanical engineers require or develop a more pragmatic attitude. Do-overs in the mechanical realm are often more time consuming or expensive than those in software. And practical experience comes with a lot of learning.
Shim feeler gauges would be readily available in most shops checking wear on moving parts. 0.0025 inches (0.635mm) was included in the first high quality (gearwrench brand) set that I looked up online.
Detected by the radial velocity method, measuring the parent star being pulled toward and away from us by a variation of at little as 2-3 meters per second! It always blows my mind that we can measure that.
It's very very weird. Also seems like they are making it all up based on their assumption of how the internals could fail. Kind of feels like SEO content to me.