The short version: the build doesn't wait on you anymore. As Rich Holmes reports, Ramp's CEO says non-engineers shipped more than 7,000 pull requests last quarter, and about 11% of PostHog's October merged PRs were opened by its own product. When the work arrives already built, the PM's day is a queue of decisions.
The ratio to watch is proposals to shipped changes. Jina Yoon's PostHog numbers put one agent at 72 reports and 11 merged fixes since July. Most of what agents propose isn't worth shipping, and the PM's job is saying which part is, quickly, against a written bar. When a proposal passes and is still wrong, the bar is wrong, and rewriting it is the best hour of the week.
That queue fills from every seat, which is why it belongs under one owner. The full argument is in part 2 of The PM Transition, every part is on the series hub, and the whole system is The Product OS.