Why it might matter to someone who values progress in the audio industry as much as audio journalists who write about just that on our behalf - is not I suggest, a question that should even be asked. All who engage in these forums, ipso facto care in just the way you question.
There have been plenty that have asked that very same question on this thread, so what you just said is not true. New technology guarantees nothing with respect to improvement. The overall design and end result is what tells the tale. When I have heard YG at shows, what they do well is even tonal balance and good imaging. Would I ever buy them, probably not. On the other hand, there are manufacturers utilizing new technology drivers that have the voicing completely screwed up. B&W comes to mind. Changing because everyone else is using new technology because you want to keep up with the trends and having the product be worse is what is truly foolish.