Has biwire speaker cabling become "old" ?

I'm here to learn. Thanks for the info, although most posts were off topic. I thought the purpose of biwiring on the speaker end was to improve crossover performance. I have four year old Chord Rumour biwires with four conductors each.
It seemed that a quick low budget upgrade to the entire system in front of the speakers would be a speaker cable upgrade, such as to Chord Odyssey or perhaps entry Cardas or
Nordost. I was surprised to see that Odyssey and Rumour are now two strand only at Chord. They say better results are gotten with jumpers. A quick check of online retailers does not show one instance of Nordost Leif Series being offered in biwire even though these cables have multiple conductors. Cardas is hit and miss with offering biwire.
So, is this lack biwire availability a cost cutter or a result of evidence that biwire (and bi-terminal speakers) is ineffective, that it was/is a cosmetic trend only ?

Last year Nordost stopped offering internal biwire, stating it was too sonically compromised, and instead offered an increased range of jumpers for biwire.

My perception has been that anecdotal reports which have appeared here and elsewhere about biwiring are highly inconsistent. Some report substantial benefits, some report no difference, and some report significantly degraded sonics.

As examples of the latter, in this thread and this one three different people reported significant perceived (and in one case measured) loss of bass when biwiring. I offered a hypothesis in those threads as to why that might have been, but one which was speculative and perhaps not able to account for the degree of the reported effects.

In any event, as is often the case in audio the question of biwiring seems to be system and listener dependent, and to not have a great deal of predictability. FWIW, I'll note that the designer of my present speakers, the generally highly regarded and certainly not inexpensive Daedalus Ulysses, has chosen to provide them with just a single pair of terminals.

Regards,
-- Al

So, is this lack biwire availability a cost cutter or a result of evidence that biwire (and bi-terminal speakers) is ineffective, that it was/is a cosmetic trend only ?

No real answer, but a lot of opinions. IMHO, the best answer and I quote well respected poster, Almarg,

"It may or may not make a difference. If it makes a difference, it may or may not be for the better."

Some manufacturers specifically design their speakers to be biwired, and others have just added the connections as a means of "audio fashion".

IME, I achieved better results with single wire and jumpers as opposed to biwire, and as I was trying the options, I found this article that seem to describe the difference I was hearing.

BI-WIRE, NOT ONLY AN ADVANTAGE

Bottom line is you try different configurations, and go with what you like.

Thanks, Tony (Tls49). Our posts went up within a few seconds of each other. As others may not realize, my statement you quoted was from some earlier threads on this subject.

Best regards,
-- Al