Do upgraded LAN cables/purifiers/switch box make a difference. What is recommended, if so?

Uh, we didn't have digital sources in 1973 

Mitch2, that’s for sure.

But we had car magazines! Remember those small ads in the back, hawking snake oil like magic carburetors that would make everyman Joe’s Chevy Caprice go 80 mpg?

Actually it was 100 mpg if memory serves

You don’t see those anymore, but the spirit is alive and well in the 2025 hifi world 😄

I tried an expensive “Audiophile” switch in my system, and couldn’t hear any difference at all. I was prepared to buy if I heard an improvement. Of course, other people have a different experience, I’m only reporting mine

 couldn’t hear any difference at all. 

Did you have the switch as close as possible to your streamer and connected with an unshielded cable to break any conductivity path for EMI/RFI to enter your system?  It's this noise that finds its way to the analogue stage. Try keep length of cable to 2ft. or less. Even a cheap switch off Amazon can bring big gains. Costs very little to try:  Netgear GS305 + cable for under $20  

@gournard I am pretty sure looking at @kerrybh 's gear he for him to say "expensive" it definitely was a switch substantially better than anything from Amazon. 

Not sure if it was up to level of one of the best reported switches Network Acoustics Tempus, or what ancillary cables or other devices were connected to it causing a bottleneck somewhere. Was there any dealer advice with this switch? Or borrowed from a friend? 

@kerrybh appears to have the budget for a Tempus, If he desires his streaming to approach the sound quality of his vinyl I wonder if he is curious to try this along with a couple of their network cables? 60 day money back guarantee.