I hope to see people build catallax markets in both paradigms: WoT arbiters who build a profitable business providing their service; and trustless programmatic escrows like Angor - let the market sort it out.

I was actually thinking more about the crowdfund element. There's the zapraiser NIP that I want to integrate with catallax, so that bounties could be crowdfunded. But no reason someone couldn't build a catallax client that uses Angor for the crowdfunding instead.