@juanmanuelfangioli. For clarity, I was suggesting that it is convenient for manufacturers if that approach is promoted. I did not say by whom.
See below (after the next para) for two quotes from Hi Fi Plus reviews of Nordost cables. I recall that magazine's reviewers as being the foremost promoters of "loom" theory.
As per my original post, I've used mixes of cables and sets of cables from the same manufacturer and both have been successful.There is a predictability in terms of results in using cables from the same manufacturer but, to paraphrase a previous poster, it is not the only road to Rome - (or Asgard :)).
"I’ve shied away from the term ‘coherent cable loom’ here, but Nordost Valhalla 2 is the very model of coherence. It ties systems together in an holistic manner often sought, but rarely achieved."
"Yet, if there’s one thing that the Valhalla experience teaches you it is that we’ve grievously underestimated the importance of cables, both collectively and relative to each other. So, not only does the cable loom create the foundation on which system performance is built, but it starts not with the signal cables but at your wall sockets."