I would say that AI has not saved me any time as a developer. What is has done is allowed me to increase scope by doing tasks like documentation and prototyping/experimentation that I would not have found time for otherwise.
Saying that the AI saves time is like saying that a printer saves paper.
You say it hasn't saved you any time because you're doing more work now - e.g. documentation. I would say that's being pedantic, but I guess the expectations shift with it, so in practice, you can't just maintain your old output level and reclaim the saved time.
I haven't seen our roadmap accelerate because of AI. I'm sure, given time, having the P2s like documentation and prototyping in place will yield dividends. But I still can't imagine even doubling our rate of progress.
I am in an area that is bottlenecked on many things besides writing the code. Testing requires physical devices and realtime execution. So having the code 10x faster is little difference when the other processes take most of the time.