Good review IMO. You nailed its sound signature which is one reason I like it so much. The only weakness in my system/room is that upper midrange. It sometimes has that upper mid glare which drives me nuts. Doesn't happen with my vinyl anymore but digital was a definite toss up. Sounded great and then...Y-I-K-E-S!!!!. I am very allergic to the glare. But The DS took care of it.
As to it being a 9 year old DAC, remember it's a FPMG DAC, and PS Audio was continually upgrading the firmware until about 2 years ago.
Good point...one which I had forgotten