What ever happened to Chase? And, for that matter, Nancy?

They decided that they no longer wished to be podcast hosts for various reasons. The current hosts don't really talk about why each host decides to stop podcasting, to protect their privacy and respect their wish to leave the podcast.
They are missed, though I think we have a fantastic crew right now and wouldn't swap them for anyone.

Good summary

There are a few threads around in the later pages here made when people left but not much more info than that.