Yeah, I have non prod environments that don't use FD that are functioning. Routing through FD does not work. And a different app, nonprod doesn't use FD (and is working) but loads assets from the CDN (which is not working).

FD and CDN are global resources and are experiencing issues. Probably some other global resources as well.

Hate to say it, but DNS is looking like it's still the undisputed champ.