I’d like to take a more moderate stance in light of my experience and those that have extensive experience modifying networks. I think achieving high quality sound can be achieved from two different directions: either through a high quality streamer or through extensively modifying and upgrading network components and a lower level streamer.
I am not sure what the cost relationships are, but in terms of approaches, buying a higher quality streamer is more appealing to me. I want high quality audio, not to go back to being an IT guy. But that is me. Lots of folks like to fiddle. My streamer produces world class sound, comparable to my analog leg and does so with a wall wart wifi extender. I tried an EtherRegen and it did not help, and in one case made it worse. I know of several very high end systems that work this way.