"the volume of code has increased and there's plenty of AI slop slowing them down"
Hyrax runs the first review pass and writes the fixes. Most of it never reaches the review queue.
"reviewers still own the final call, but the routine stuff happens automatically before anyone looks at the code"
That's what Hyrax does. It reviews the PR and writes the fix. You're still the one who merges it.
"reviewers manually check for style and logic"
Hyrax does that pass and sends the fix as a PR. Review starts past the obvious stuff.