What happens when there are no more entry-level humans to be promoted to mid-level, and so on?
Well looked at what has always happened in society when young people have no hope for the future: massive societal disruption mostly in the forms of revolution + violence.
Since this isn't the 1800s anymore there won't be any major revolutions but I expect way more societal violence going forward. If you have no hope for the future it's not hard to go to very dark paths quickly, usually through no fault of your own sadly.
Now add how easy it is for malicious actors to get an audience and how LLM tech makes this even easier to do. Nice recipe for a powder keg.
In the cobol world, lots of highly paid senior consultants, who come in and out of retirement to support systems.
Other than that, I am guessing junior roles will move offshore to supply the body shops where the corporate IT work has been going.
> What happens when there are no more entry-level humans to be promoted to mid-level, and so on?
No business cares about that question, just like the Onceler didn't care how many Truffula trees were left. It's not their problem. Business is business, and business must grow, regardless of crummies in tummies, you know.