As spinaltap suggests, if I understand his comment correctly, a high quality switch and good quality cabling should provide the same level of SQ, without further investment.
That is exactly my hypothesis. YMMV.
Even so, while my NUC isn’t fed by a LPS, I have recently added a
DC iPurifier2 to its PSU - which effectively provides a regulated power supply for my NUC at considerably less cost than a dedicated LPS.
This tiny ‘Gum Packet’ sized device has made a subtle, yet profound, difference in the overall sound produced by my particular system. On first listening, I wondered if it had made any impact at all: but the longer I listened to familiar music via Tidal it didn’t take long to be pleasantly surprised by how much my system had improved.
Given Amazon’s policy of returning ‘unsuitable’ goods for refund, I recommend anyone (without a dedicated LPS) to purchase a DC iPurifier2 for their NUC or Nucleus/+.
In combination with my 8Switch, the DC iPurifier2 has bought about a substantive system improvement.