Uncledemp 5-7-2016There are a multitude of factors that are involved, some of which have been well stated in the previous responses to your question. I would say simply that as in many other technical fields, for example medicine, audio is an inexact science.
If engineering expertise can be applied in a factual manner to audio, why does a company not dominate as a result?
Seriously, I often read what doesn’t work. But what does? I assume electrical engineers are designing at least some of the available equipment. Is it just the nature of audio that lends itself to this differing of application and result?
And I’ll add that a good engineer is open-minded enough to recognize that while circuits and systems can be analyzed and measured, some things inherently have little or no predictability. One example, among countless others that could be cited, being the effects of electrical noise that may be coupled into a circuit. Or the effects involving digital cables that I referred to in my post near the top of this page.
Also, just as in the case of, for example, an automobile, any design represents a unique combination of a vast number of tradeoffs. And as with automobiles, no matter how perfect the net result of those tradeoffs may be, no one company will dominate because different people have different tastes, different practical requirements, and different budgets.
Regards,
-- Al