Also rereading, the tweet the central point seems to be why the adoption curve of ai by (individual ?) developers within Google seems to be the same as of other companies.

I think this begs the question, why should we expect AI adoption curve of Google devs to be any different from any other company?

Adoption, has been pretty rapid everywhere from what I can see, the tooling itself is still fairly unstable as everyone is rapidly iterating.

The productivity gains are there, but they seem much more modest than people like to admit (10-20%).