Is cable synergy important?

I ask this because for a long time I didn't think it mattered much if you mixed and matched cables.
You know, use brand A company for the speaker wire and company B for interconnect etc.
However my recent experience with Clear Day cables has got me convinced that if the cables do what you like then stick with the same brand and cable up.
I had puchased the Clear Day cables and really enjoyed how they cleaned up the sound of my SET amp and Tannoy speakers.
So much so that I thought I would audition the Clear Day IC with the very nice xhadow xlrs, just the ticket for my new Red Dragon Leviathans.
It was a very nice match and strengthened all the good things that the speaker cables did.
My system is now the most revealing it has ever been and not in the least bit etched or zingy.
So at least with my positive experience in using speaker wire and interconnect from the same company(Clear Day)I would say that cable synergy is important.