This seems to assume more code shipped equals more work done. I am still not convinced that this is necessarily the case. Sometimes it is. Sometimes it is not. You mentioned that reviews are now the bottleneck and that your familiarity with the code has decreased. That tradeoff might eat into the parallelization gains over time.
Definitely not - the biggest risk with this increased speed is going full-bore in the wrong direction. A product mindset (and a critical eye to architecture) matters more now than ever.
Most people hyping their AI use mention the short-term gains without taking into account how it affects overall long-term success. We are creatures of convenience.