Surely a mega-fast glitch of high enough voltage can cause severe problems so it would be good to know it is occurring. Glitches such as sudden static discharge can fry components in ECUs designed to carry only small currents. There are a lot of such sensitive components in modern electronics - it is their development and use that leads to much higher signal processing speeds and better engine/system control, better ABS response, stability control etc.
Examples : secondary insulation failure in HT circuits, back-EMF from defective inductive components (ignition coils, solenoids), bad contacts in switches, occurring sporadically and at the wrong time (as far as an ECU is concerned) could result in interruption of programmed events and manifest as bizarre symptoms.
So, if glitch capture is easily available, I would use it. If no glitches recorded then move on....
Use of min & max : anywhere where you need to know the range of operation of any component. The most common use given earlier : monitoring battery/charging voltage when pre-heating, starting, running etc. You have an immediate view of glow-plug health, battery/starter condition, charging system operation.