I am sure there is some compromise in using a linear power supply - in fact I know there are compromises.
Perhaps I should explain.
When developing Hugo in 2012 I had to use switching regulators (battery life issues) rather than linear ones, as we all know linear regulators sound better don't they?
Funny thing was, in testing and listening, the switching regulators sounded a lot smoother and darker with much better sound-stage depth.
Also the DAC measured a lot better too, particularly with very small signals. I now know exactly why this happened, and why they sound better and exactly why they measure better within a DAC.
Moral of the tale? Don't make assumptions based on what you think is happening, do the work, do the measuring, and do the rigorous listening tests. Then you find out that things are not as simple as you think, and you find out that previous certainties were mere assumptions.
Rob