What would y'all like to hear on a potential fifth episode? Any suggestions are welcome!

If and when @Imbens and I do an Ep 5 (not a guarantee) [EDIT: We're planning to record an episode featuring @SG, @Austin, and maybe other members of the Manifold team!], I will award the bounty to the different suggestions in proportion to how much I subjectively feel they influenced the episode.

Topics of previous episodes (from memory):

Ep 1: Live closing-soon betting, terrible sound quality

Ep 2: Manifold's rise at Proof School, calibration

Ep 3: Self-resolving markets, dating markets, personal goal markets, Audrey

Ep 4: Chaotic Manifold trivia game at the beach with many people, Rachel and Austin's wedding

[EDIT: THE EPISODE HAS NOW BEEN RECORDED AND NEW SUGGESTIONS ARE MOOT! I'll award the bounties once it's edited and released.]