Ostensibly there is no reason this isn't already happening at large companies. I used to think it was an expertise bias, since the impact of LLMs is inversely proportional to your own ability - but I think this is also no longer the case. Even if you're extremely skilled, they can already greatly supplement, if not supplant, you on implementation and increasingly even planning/architecture.
So my new pet theory is that this is one of the few times we're seeing a positive effect from the heads of all of these big businesses being part of weird public (e.g. WEF) and private (e.g. Bohemian Club) orgs where they get to together and conspire to conquer the world or whatever. Rapid replacement of labor would be horrifically self defeating, because you'd end up not only tanking your own economy but having a bunch of angry and increasingly desperate people with a whole lot of time on their hands. That doesn't tend to end well for the powers that be.
So I think there's going to be a conscious effort to transition between this era, and whatever comes next, in a more controlled way than $$$ YOLO $$$.