Also super effective for embedded firmware... I threw fable at an espressif chip and it decided to rapidly verify things by doing memory dumps to see what it was writing to a screen, rendering it to a PNG, and doing visual checks.
The thoroughness with which agents can test and QA software is unrivaled. I pointed out something wasn't rendering right in a mobile (in-app) browser. The thing goes to the depths of Mordor to reproduce, simulate, fix, deploy, verify. It created an ephemeral vercel deployment to throw at an iPhone simulator! The absolute grind on these things.
Humans could simply never match this level of intensity. We'd run of energy, we'd extrapolate, we'd hope it'd work out. The software of the future will be of a quality and performance we've never experienced before. It's amazing to watch this shift.