After reading a fair amount of OSS code, it's rather glaring that the data structures and algorithms are more like atoms than molecules in software design. We do have some molecules in the Design patterns, but they are more suitable to the OOP universe, like the collection api (filter, map, take,...) when dealing with groups of objects or the reactive api for dealing with concurrent tasks.

Most of software development is looking at some process and then decomposing it recursively until you get to those molecules/atoms of the computing world. Coding them is trivial, and while you can gain a certain boost from the AI, after a while you no longer have to write that much code. It will turn into a balancing act where the introduction of a new concept has to be done carefully.