[SOLVED] Fresh install Pi-4 rev 1.5 not joining network

[TheOldPresbyope]

The lack of documentation of the changes in Rev 1.5 is distressing. The revision code b03115 doesn't show up (yet) in the official list for example, although I notice a Adafruit github repo just got bumped to include this rev in theirAdafruit_Python_PlatformDetect script. 

Other than Geerling's blog entry, which suggests minimal impact, I don't see anything online. Is my Google-fu on the wane?

Regards,
Kent