For some unknown reason, but Touch is remaining connected to the Wifi.
I did not do anything, it started working again on its own.
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As a test, once I got the Touch connected to my Wi-Fi I left it on a
radio station to stream overnight. It has been running for 9.5 hours.
Assuming the Touch uses more power while operating than in standby mode,
I am going to conclude it likely means the power supply is okay.
Past observations
if the PSU is in slow failure mode you can replace it with something
like this
https://www.amazon.com/MyVolts-adaptor-compatible-Logitech-Squeezebox/dp/B00GQVG8Q2/ref=pd_lpo_1?pd_rd_i=B00GQVG8Q2=1
The WiFi card in the Touch may not be compatible with more recent WiFi
setups, so a bridging