Lamentably a lot of Hifi Audiofiles don’t test their gear properly.
The brain simply can’t hold a sonic memory (to compare to for longer than a few seconds)
So all the talk of “burn in” and “after 24 days the sound really blossomed” is all moot without rapid a/b comparison. (Play music for 20 seconds / swap play same musical passage for 20 seconds - listen very carefully for differences - rinse and repeat until you find: a difference (if so what is it? which one sounds best and how or if it’s impossible to tell the difference - that’s means the new gear is a waste of money)
A wordclock device might like a period to settle down and become stable (like a day)
What you never see on these forums is
Audiophile lets the gear burn in for two weeks and then A/B tests it with their old gear.
Instead you will see
Audiophile let’s the gear burn in, declares it great and that their purchase sounds way better than the old gear (but no a/b test to make sure, instead the audiophile just moves forwards convinced their money was well spent)
This is pure purchase justification bias with zero critical and comparative evaluation.
If you can point me to someone rapid a/b testing an Ethernet switch with external wordclock please do.