Thank you for the quick response! Really refreshing to get an answer so quickly. I really appreciate it.

I dunno, I keep reading that Catalina is Apple's Vista. I have to say either I'm lucky or people love to complain. Updated without incident and everything is running fine.

Thank you for pointing me to the update. Not sure why I hadn't updated already. Happily tracing my connectivity again (and in Dark Mode!). Thanks again.