Has anyone been made measurably more productive with this stuff? Is even 25% achievable? I'm a software engineer, and I spend less than 25% of my time typing out code. So even if copilot could write every single line of code for me it could not improve my productivity by 25%. In order to make me 25% more productive it would also have to somehow speed up everything else I do at work as well. Has this been demonstrated?

Auto-completing function bodies with stack overflow content is cool! I'm not trying to say this technology isn't doing anything. It's clearly doing something "cool". But that doesn't necessarily actually make anyone more productive. That seems like an extraordinary claim (at least based on my own small experience working with it), so I'd expect to see some extraordinary evidence.

Yes, I wrote a small app in kotlin to scratch an itch. Chat gpt 3.5 gave me code that in the past would have taken me weeks to figure out from the mountain of verbiage in Google docs for the ever changing APIs. Normally googling for this stuff just leads to loads of things that don't work and I have to figure out why. With chat gpt I just pasted whatever error and it gave me the right answer the second or third time. I now have my (private) app that does what I need. Without gpt it would have taken me several weeks (real time, it's a hobby).

I've seen new colleagues use co-pilot at work and it definitely increases the amount of stuff they can now figure out for themselves within a given time.