No particular reason, except that I was not aware that an upgrade was not recommended. If it comes down to that, I could do a clean install, but I would prefer to figure this one out first, since I’m not sure a clean install would solve this problem.
Thanks to all who tried to help. I have absolutely no clue what I did or could have done, but this morning I was able to Ping my router. I still get nowhere in firefox, but thhe Epiphany browser does seem to be working. At least now that I’ve gotten this far, I should be able to get back into Linux. Its been a few years.