Thanks Simon. I've had Wordpress sites for a long time without any issue, though none are really that big or involved. I do know that things are really evolving though and it may be antiquated at some point. I've never heard of Jekyll or Hugo but after a quick Google search they look interesting. It sounds like you've really gone deep into these things, or maybe I'm just easy to impress.
Libsyn released an update for their updated plugin for me to try. I guess I'll give it a go and see what happens. If it shuts it down again I know how to fix it with relative ease.