That's kind of the point in GP... everything around the code has improved... the workflows, definitions, documentation, process. I'd say that all of those things are improving and expanding at a rate faster than the improvements in code output, which are also happening at a faster turn around than actual people.
I've said several times that when I use an Agent, I'm getting about 2-4x the value and about 10x the output... the "value" is features landing in code and the difference to the 10x is documentation and testing. While a lot of that may not get reviewed by every person that touches a product, it helps with further ai based feature development.
I'm not a big fan of running many agents or outright vibe coding slop... but you can definitely leverage the coding agents and get a lot of improved output.
Then is it a real 10x increase in output if the output is in supporting areas and not the code/feature delivery? It seems like you’re saying that you are now able to maintain documentation at a faster rate and increase testing but not the actual development speed of the feature itself.
I'm not talking about what the developer is doing - I'm talking about what the company is doing in terms of initiating new development work. Again, startups and one-man shops are different because you control your own pace, but in many large corporations you may sit around just minding shop until the next big product development comes along (I would use this time to start my own initiatives to build tools and libraries to help the team), and that company pace is not being determined by how long development takes.
This is especially true if like most developers you are not working at a company where software is the product, but rather where software is part of the product, or where you are part of IT working on internal systems, not part of product development at all.