The productivity is going into perverse incentives[1], e.g. we have improved (by which I mean "increased") token use. More PRs every day. More lines of code. All things we knew were shit-brained metrics a decade ago (obviously except token use).

We've also increased how much our coworkers need to read, or deal with. You can get an AI to make any point you want, so you can ignore the 5 humans raising alarms due to the 1 clanker you made say what you want to hear.

All numbers going up.

There are obviously people producing additional true value with it, probably, but that's almost certainly scarce.

[1]: https://en.wikipedia.org/wiki/Perverse_incentive