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The ego driven poster is so unhelpful. Good on you for making some changes , especially the SMPS to Linear, and isolation ( hopefully galvanic and optical ). You can simulate the dedicated line by using a high quality extension cable off opposite leg on your house power panel for the digital bits. Leave the analog on the other leg. It also helps to get any motor, compressor or furnace, refrigerator on the digital leg. This will reduce noise and give you an idea of what you might gain. Also a separate power power conditioning box for the digital bits should help.
Have fun, enjoy the journey and the music. Ignore the idiots.
My system has all digital sources, with a separate DAC (in addition to the one built into my preamp) and over the years I've found that the cleaner the AC power, the better the DACs perform. When I upgraded from a PS Audio P10 power conditioner to a P15, I was surprised how much the sound quality improved.