Yes. I do all of this and I'd estimate 50-100% coding time savings. A lot of that comes from better multitasking over single-workstream throughput, which I suppose might compromise the gains depending on what you're doing. For me it amplifies the speedup by allowing some of my "coding time" to be spent on non-coding tasks too.
I could be wrong in some subtle way I'm not seeing, but I believe the model we're working in avoids the downsides. I actually think my review bar is slightly higher now, because I don't feel as much pressure to compromise my standards when I know Claude is capable of writing the code I want.
I would say the main downside is not knowing what all your code does, and where to find any particular function.
After the initial coding is complete, will you need to use AI to fix bugs? Presumably that is both slower and more expensive than doing it by hand when you know exactly where to look?
