I don't keep up with the "hot" subject in audiophile techno-babble as
much as I used to, but "jitter" was once a biggie.

Come on now: were are talking about phenomenon that occurs on a scale
of NANOSECONDS (billionths of second). Electricity (and therefore
electrical signals) moves at a rate of about 1 foot per nanosecond. From
all the graphs that claim to measure this phenomenon it appears that it's
not a cumulative thing; and even if it was how many billionths of a second
have to add up before you can hear the effect??