"Technically it's not possible to pass native 24/192 through 1 rca input or 1 toslink input "
Hello Kops - yes, I am familiar with this statement. Only AES or even two ARS can trasfer 192/24. I am not engineer and thus I am unable to argue on merit.
However, I read thi statement many years ago, and since it was not written in bible and in stone and both coaxial and fiber optic may have very wide bandwidth I see no inherent reason why clever engineering and/or change in standards cannot absoultely make it possible.
For support of the above (support is not prove its just that "support" - I advise you to look into Sound Sceince Web Site. Very cleaver engineer builds music servers there (Music Vault). One of these servers "Music Vault 24-192" - can (and you can infer it from its title too) pass 24/192 data via its coaxial output. This one I am planning to use together with DAC part of SACD Player if and then I will find one I like, and .....can afford
Thank you
Rafael
P.S I hope I am right in my optimism.