That’s the job of the reviewer - I know several who average many measurements and then post charts with numbers deliberately rounded to the actual significant quantities, to avoid being overly pedantic. SoundOnSound does a good job of clarifying when a difference is meaningful or not, too.
I find that because most people these days assume hardware is going to be “good enough” as a base standard that nobody follows up on technical measurements anymore. But some cheaper hardware is proving that they might still be useful to help sort out the bargain basement gems from the trash.
So my feeling is generally it’s navel-gazing for high-end gear (or it’s just pure scientific validation of the MFR’s claims, when properly done and caveated accordingly), but can be very very useful for consumer grade gear since jitter, skew, frequency response of filters, phase response, excessive delay or lag, these are actually audible and noticeable. Even UI delay in button pressing is not difficult to accurately measure and provides a useful and practical metric for how a unit will “feel” in operation, along with a careful opinion from a knowledgable reviewer who can compare it to other well-known baseline referents in the same category.
