That study is from early last year, and those who conducted it now question the methodology and have found in a later revised study they did with newer models and more robust experimental design that their latest estimate is between 5% slow down in work (mainly amongst new devs) and a 38% speed up (for experienced devs).
Have they factored in AI/robotics increasing individual productivity?
Tell them it's like Twitter, reddit, Instagram, and YouTube all in one. You can sign up for whatever type of content you want, just like you would sign up for any of those aforementioned sites, but the difference is that the sites can all communicate with each, and are independently run by non-profits, community groups, and different organizations and individuals, rather than a single centralized entity. You can select an instance of the software that suits various interests or niches, or just join a large instance for a bigger pool of content to start with locally. No wrong choice, as even small instances can communicate with large ones, just pick one you like and suits your values or convenience.
It should be all instances, I believe.
EDIT: DISREGARD MY COMMENTS - This was in fact a bug, and seems to have been fixed with the latest update. Just checked my old account logins and they work now.
~~I was mainly referring to the flagship instances. I am on a smaller piefed instance as well, and have had no issues. At least with Lemmy, they would give you a reason, but in my case they acted like it was a bug. So draw from that what you will, but that has been my experience, and I am currently unable to register an account on a primary piefed instance, without being given a reason for that being the case.~~
Congrats to piefed devs! This is a bit more of an accurate user tracker if anyone is interested:

Edit: see below
~~It bans users for no reason, and without explanation~~
Totally fair, and I understand the skepticism. I am not promising anything here, all I can tell you is what my intentions and overall plans are, but you have no reason to take me at my word.
Honestly could not think of a single thing that they could do to get me to download the launcher. None of those features make it steam, and never will
How will this be enforced?
AI code is stolen from open source, so as long as you’re using it in the original intention of the code that was stolen, using Big Tech’s money to create something free and open, I’m OK with it.
This is exactly how I have been viewing it, using big tech's tools against them. I know that kind of sounds like cope, but if the goal is to replace their platforms with open source decentralized alternatives, then the least we can do is be on the same playing field as far as development tools go.
The thing that is a bit unclear though, with regard to AI projects based on open source code, is what license that would fall under. I suppose it's not much different than any other open source project that uses other open source code, but the difference is that with human coders at least you can trust that they know where the code came from, whereas with AI, you can't, and have to verify every claim they make.
These are interesting anecdotes, but I'm just going based on the most recent studies available. I think overall we can say the jury is out, but as models and established best practices improve, there will almost certainly be some level of improvement. Maybe not everywhere with every company, but for those who know how to leverage it properly.