Codex and the like took off because there existed a "validator" of its work - a collection of pre-existing non-LLM software - compilers, linters, code analyzers etc. And the second factor is very limited and defined grammar of programming languages. Under such constraints it was much easier to build a text generator which will validate itself using external tools in a loop, until generated stream makes sense.
And the other "successful" industry being disrupted is the one where there is no need validate output, because errors are ok or irrelevant. A text not containing much factual data, like fiction or business-lingo or spam. Or pictures, where it doesn't matter which color is a specific pixel, a rough match will do just fine.
But outside of those two options, not many other industries can use at scale an imprecise word or media generator. Circular writing and parsing of business emails with no substance? Sure. Not much else.
This is the reasoning deficit. Models are very good at generating large quantities of truthy outputs, but are still too stupid to know when they've made a serious mistake. Or, when they are informed about a mistake they sometimes don't "get it" and keep saying "you're absolutely right!" while doing nothing to fix the problem.
It's a matter of degree, not a qualitative difference. Humans have the exact same flaws, but amateur humans grow into expert humans with low error rates (or lose their job and go to work in KFC), whereas LLMs are yet to produce a true expert in anything because their error rates are unacceptably high.
And the other "successful" industry being disrupted is the one where there is no need validate output, because errors are ok or irrelevant. A text not containing much factual data, like fiction or business-lingo or spam. Or pictures, where it doesn't matter which color is a specific pixel, a rough match will do just fine.
But outside of those two options, not many other industries can use at scale an imprecise word or media generator. Circular writing and parsing of business emails with no substance? Sure. Not much else.