Junior devs and sysadmins who do not much very useful stuff yet, but get some basic experience. And people whose main required traits are human voice and following script.

Transient processes are a thing, one can have plenty of middle and senior devs and sysadmins, with the economy not producing new ones anymore. So the employers are hiring those, and replacing juniors with AI. Whether that works I'm not sure.

So at some point the AI bubble will be over (at least in dev and sysadmin and such work), but there will be fewer developers, and there might eventually be a situation where there are fewer qualified developers in the economy overall. Which would give centralized corporate things a market advantage over smaller non-corporate things, due to cost of development growing after the fall happening now.

While for some not very qualified jobs humans won't be needed anymore - while that "AI" is expensive, it might really be, even after the bubble crash, more affordable than hiring a human (in a western country) for a bullshit job - except in everything I've read those bullshit jobs were treated as social responsibility to teach work ethic to growing generations, that weird mix of individualist and working class themes in books describing pre-Depression USA. Yes, individualism is important and being self-reliant is important, but even that protestant ethic wasn't about capitalism more than it was about dignity and hard work.

I think Silicon Valley is consciously playing Asimov's Foundation with our planet (seeding technologies affecting humanity's development by some schedule with expected global results), except where Asimov's Foundation was about preserving knowledge and civilization, they are moving in the opposite direction. That is, they may not understand it. They may think they are building that sci-fi empire the Foundation begins with. But in actuality they are breaking concrete and steel things that work and replace them with paper huts kinda resembling something that would work better. Metaphorically.

They don't understand what an empire is, neither the "mandate of heaven" kind nor the "unity of civilization" kind (heck, even the Soviet covertly Christian "building the city of sun" kind, like in Vysotsky's song - "... но сады сторожат и стреляют без промаха в лоб"). You don't build an empire by burning libraries and poisoning discourses, you also don't build an empire by making every its citizen uncertain whether they are a free man or a slave (it's a common misconception to start an attempt at an empire from points where previous empires failed ; that state is usually expected to fail again for the same reasons).