Yeah idk, have a half dozen or more tire gauges laying around. Generally use the first one I grab unless the pressure doesn’t go high enough on it. No idea how old they are but I don’t recall buying a tire gauge ever, so 20-50 years old?
Random comparisons between gauges and the couple vehicles we have with tpms shows they’re close.
Guess it’s something I should be more concerned with after 30+ years of no issues?
If you have a gauge that is inaccurate, why not just toss it and get a new one? Not sure it’s newsworthy