I'm increasingly convinced of the opposite. IMO Fable was pretty similarly capable for my day to day work as Opus.

I think there's a pretty good chance that we've reached the point of diminishing returns, for our specific use case.

There are still like a billion other (more difficult) use cases to be tackled, but I think "generating code" has gotten really good to the point where the other bottlenecks will prevent further exponential progress on this specific task.