At great risk, I'll continue the break-in debate.

10 things below which, in my opinion will influence the sound more than your cables breaking in:

Your listening position (+- a few cms)
Position of room furnishings
Ambient temperature
Ambient noise
Humidity
Condition of your speaker cones
Your state of mind (mood)
Your state of body (alert, tired)
Status of your ear muscles
Expectation of change (placebo effect)

A super computer analysing a digitized air-pressure curve might be cable of discerning minute changes in sound quality, but the human brain?? Add to this the problem that these comparisons are being made over a long time period and I think we have measurements which are beyond the capacity of the human brain (even your's Ron)

Well, beyond my acoustic abilities anyway.

Cliff

Main system - Sources (Kodi-HTPC, Vero 4k, FireTV, Sat) into Trinnov Altitude 32 (8-16) (+Roon), Trinnov Amplitude 8 amp & Vivid Audio (Giya G3, V1.5) and REL Stentor III speakers. Others: F80 + Raspberry Pi and other Pi systems.