Actually I have and I am using it. As you know SACD is a real cluster you know what in many ways. Anyhow some discs are recorded and designed to be played front back, center and rear back, and some front, surrounds and center. If the correct set up is not used an enormous amount of the engineers intent is lost. So I have my Marantz SACD player connected for the first option above via multi channel analog and used to use the Oppo for the second option above over HDMI, and everything was fine. Now I will need to replace the Oppo.
And yes, I will complain about gear not being backward compatible. As you know I'm a hoarder, I purchase good quality gear, look after it and expect long service. 10 years in my book is not good enough and engineered by the "waste makers". Any HDMI device no matter what age ought to be able to play through any available HDMI input. The fact it can't is a disgrace and a failure of good responsible engineering.