If you are using Roon Nucleus as a transport to connect directly to a DAC, then a linear power supply will definitely improve the sound (as long as your audio system has the resolution to show this difference). If you have soft or laid back amps/speakers, you might not see this improvement.
Teddy Pardo has a Roon/NUC power supply:
https://teddypardo.com/product/teddynuc/
But you can also look for a 19V 3.5A (or 4A / 5A) power supply. Teradak may have one on ebay that is less than Teddy Pardo.
Teddy Pardo has a Roon/NUC power supply:
https://teddypardo.com/product/teddynuc/
But you can also look for a 19V 3.5A (or 4A / 5A) power supply. Teradak may have one on ebay that is less than Teddy Pardo.