SACD was always a dumb and really dumb audiophool concoction. It was devised because the absurd and totally wrong notion of the "step" theory of PCM. That was debunked at the outset, but you know audiophools and their "magic" cables etc. Those loons have no time for science or logic. The only benefit was that it did support multichannel audio with five discrete channels rather than the two of the CD.
However it does not stop there, as single bit DSD is a huge pain to master, process and edit. So pretty soon everyone stopped doing that including its most vociferous proponents. So, when all was done a dusted they converted the final product to DSD. They kept darn quiet about that though, until their cover was blown.
It is an awkward inconvenient system without merit. Have you got that "you dumb as ditchwater audiophools"?