Thank you for giving your opinion.
There are many controversial ideas on the matter, but software like HQPlayer for example makes it a strong point. Consider that most DACs carry out operations inside it and often through multiple conversions to pcm and dsd. That's why it's better to have all this done from a computer and then sent to the dac.
But back to my initial question, what are the ways JRiver can upsample to DSD? And what are any plugins you can rely on to do even better?