I can see it happening in marketing. But else? Here they are planing to release an LLM to the entire staff. will probably costs double digits millions per year, at least if users heavily use it and I can't see how that much money is saved by using it.
I expect general practitioners to eventually be replaced by LLMs+people who are just trained to do physical examinations. In my country, new GPs are now mostly women who want to work part-time (which makes them much less experienced than the old GPs that worked 40+ hours and which results in shortages) and who appear to be googling stuff anyway. This will be of biggest benefit to poor people, BTW.
I expect that translators will be replaced with LLMs pretty soon.
I expect that lots of art will start getting made by LLMs, although I expect that the main effect will be a much greater access to custom art, music, etc by people who would never commission something from a real person anyway. The artists who are already struggling will probably lose their jobs, but not the top tier ones.
For programming it may actually make it easier for junior programmers to get a job, if they learn how to use LLMs well. It's often hard to justify hiring a junior programmer since they require so much handholding and often run away quickly again for a variety of reasons. An LLM can not only help them write code, but also help them figure out what existing code actually does. Historically, programming having been made easier just increased what is expected from software, rather than cost jobs, so programmer's jobs may change, but I doubt that they'll go away.
Most people who do writing will probably start using LLMs ('write a paragraph arguing that...'). Lots of (young) people are not too literate anyway.
Teachers will probably be replaced with LLMs eventually that effectively work as a personal tutor. Given the decline in education, this may happen quicker than we think as one sensible company making a LLM based on traditional teaching methods is likely going to beat the insanity of modern education 'professionals.' Basically, parents will pay for a LLM to fix the bad schooling of their kids, rather than the homework institutions they currently use.
Journalists mostly just rewrite copy delivered to them by others. They'll definitely be replaced by LLMs together with people picking the right stories (and 'right' political manipulative angle how the story is to be presented).
My observation over the years is that people tend to overestimate how fast new technology matures, but underestimate the effect it will have in the long term.