In marketing, the entire low-end to mid-tier market is gone. Instead of having teams working on projects for small to mid-sized companies, there's now a single Senior managing projects with the help of LLMs. I know multiple agencies who cut staff by 80-90% without dropping revenue.
Translation (of books, articles, subtitles) was never well paid, even for very complex and demanding work. My partner did it a bit on the side, mostly justifying the low pay with some moral bla about spreading knowledge across cultures... With LLMs you can completely cut out the grunt part. You define the hard parts (terms that don't translate well), round out the edges and edge out the fluff, and every good translator becomes two to ten times more productive. Since work is usually paid by the page, people in the industry got a very decent (at least temporary) pay jump, I would imagine around 100%.
Support is probably the biggest one though. It is important to remember that outsourcing ot India only works for English speaking countries. And even that isn't super cheap. Here in Germany, if you don't have back-up wealth, it is your constitutional right to get some support from the state (~1400 euro), but you are obligated to find a job as soon as possible, and they will try to help you find a role. Support was always one of the biggest industries to funnel people towards. I talked to a friend working there, and according to them the complete industry basically stopped advertising new positions, the only ones that are left are financial services. The rest went all in on LLMs and just employ a fraction of the support stuff to deal with things escalating enough.
And that's not even touching on all the small things. How much energy is spent on creating pitch decks, communicating proposals, writing documentation etc? It probably goes up as far as 50% of work in large Orgs, and even if you can just save 5% of your time by using LLMs to phrase or organize, there is a decent ROI for companies to pay for them.