Seeking Streamer & Dac that has 12s outputs and inputs

In my quest to upgrade my Dac and streamer, I was looking at 12s compatible equipment which is said to provide the best sound available. I need a transport and streamer that have 12s outputs and a Dac that has 12s inputs. The issue seems to be that there is no standard established for the 12s architecture, as well as limited availability of same.   Are the manufacturers actively adding 12s inputs & outputs to their equipment? In 12S outputs I see the Jay's Audio having 12s. I currently own a Lumin U2 mini and if I wanted to upgrade with another Lumin streamer, I do not believe Lumin offers a streamer with 12S. As far as 12S inputs not many dacs provide 12S.  I believe that what I am seeking is very hard to find. My alternative is to just buy equipment that is fully balanced. My rationale being that fully balanced provide better sound that RCA connections.   Any thoughts would be appreciated. If I am wrong about any of my assumptions I would be happy to be corrected. Thank you.