Dirty little secret of Pedigreed, decades old Speaker line - no one will address

You have the reasoning inverted as to cause and effect.  You are saying essentially that because YG has not changed/innovated, it must be inferior.  You should first establish that YG is inferior--that there sound is no longer competitive with other speakers, and then you can speculate as to why that is the case and we would have something to discuss.  Have you heard YG and the other speakers you are comparing them to--Vivid, Magico, Rockport, etc. and found them to be wanting (i.e., established the effect--inferior sound)?  Have you established that the other brands have, through time and implementation of changes, improved while YG has not improved?  That would at least start to make the case for the cause.

@john1 

" Zero high end manufacturers (other then YG) over countless decades, using aluminum cone mr drivers amounting to nothing, rather then some kind of something, goes considerably beyond being unlikely as to being insignificant."

That sentence makes absolutely no sense, and you should be embarrassed by your original thread. Ridiculous. 

You also use then incorrectly instead of than twice.

I've never heard a major high end speaker company not improve when they change their mr drivers. Including Rockport, Magico etc. To not even try bothers me. Yes, I have problems with most aluminum midranges, although Vivid was far, far better then most.  No one mentions my criticisms of Wilson which are at least philosophically related.  YG has done some very interesting things with improving silk domes to be sure.  Stuff Wilson won't even reach for.  YG has done a lot of work on improving their bass drivers too & their xovers were always their claim to fame.  To not do a single thing ever over decades to their mr drivers blows my mind but if it doesn't concern others on AG (even as other manufacturers haven't & won't go near it for decades) then G-d bless. Just because I see a lack of integrity applied here but exercised elsewhere, doesn't mean anyone else is necessarily bound to find it the least bit peculiar & worth noting.  I also notice almost all comments address the spirit of what I'm saying, rather then the technical letter of linguistic correctness - which speaks to the intrinsic integrity & honorableness of most AG contributors.  Worth noting.

I don't see how not changing their midrange driver (at least visibly) is an integrity issue by the company. They manufacture their drivers to meet their specifications and design goals for the speakers that they build. I think that actually shows more integrity, not less. They are sticking by what they believe to be the best for their business. If their choice is wrong, the market will sort it out and even potentially put them out of business. Why would that matter at all to any consumer unless one owns their product? All in all, this OP and follow up is a bad take on the situation IMO.

To csmgolf - Ralph Waldo Emerson once wrote: “A foolish consistency is the hobgoblin of little minds.

That & the market hardly sorts out all issues evenly or in every ones interest. 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.