On the occasion that I find myself having to write web code for whatever reason, I'm very happy to have Claude. I don't enjoy coding for the web, like at all.
But I think that that can still be a pretty good boost — I'd say maybe 20 to 30%, plus MUCH less headache, when used right — even for people that are doing really interesting and novel things, because even if your work has a lot of novelty and domain knowledge to it, there's always mundane horseshit that eats up way too much of your time and brain cycles. So you can use these agents to take care of all the peripheral stuff for you and just focus on what's interesting to you. Imagine you want to write some really novel unique complex algorithm or something but you do want it to have a GUI debugging interface. You can just use Imgui or TKinter if you can make Python bindings or something and then offload that whole thing onto the LLM instead of having to have that extra cognitive load and have to page just to warp the meat of what you're working on out whenever you need to make a modification to your GUI that's more than trivial.
I also think this opens up the possibility for a lot more people to write ad hoc personal programs for various things they need, which is even more powerful when combined with something like Python that has a ton of pre-made libraries that do all the difficult stuff for you, or something like emacs that's highly malleable and rewards being able to write programs with it by making them able to very powerfully integrate with your workflow and environment. Even for people who already know how to program and like programming even, there's still an opportunity cost and an amount of time and effort and cognitive load investment in making programs. So by significantly lowering that you open up the opportunities even for us and for people who don't know how to program at all, their productivity basically goes from zero to one, an improvement of 100% (or infinity lol)