just thinking from the finance world, in 2010 no knew how to program on the desk and no one knew sql, and even if they did the institutional knowledge to use the dev systems was not worth their time. So you had multiple layers of meetings and managers to communicate programs. As a result, anything small just didn't get done, and everything took time.
by 2020 most junior guys knew enough python to pick up some of the small stuff
in 2025 ai tools are good enough that they're picking up things that legit would have taken weeks to do in 2010 because of the processes around them not the difficulty and doing it in hours. A task that would take an hour to do used to take multiple meetings to properly outline to someone without finance knowledge and now they can do themselves in less time than it took to describe to a fresh cs grad.
Those tasks that junior traders/strats are able to do now that would have taken weeks or months to get into prod going through an it department i'm seeing cost drop 90% everyday right now. Which is good, it lets tech focus on tech and not learning the minutia of options trading in some random country