Originally I thought LLMs would add a new abstraction layer, like C++ -> PHP, but now I think we will begin replacing swaths of "logically knowable" processes one by one, with dynamic and robust interfaces. In other words, LLMs, if working under the right restrictions, will add a new layer of libraries.

A library for auth, a library for form inputs, etc. Extensible in every way with easy translation between languages. And you can always dig into the code of a library, but mostly they just work as-is. LLMs thrive with structure, so I think the real nexy wave will be adding various structures on top of general LLMs to achieve this.