This article explores how advancements in software design, particularly through LLMs, shift the focus from using standard libraries to generating custom code. It highlights the implications for dependency management and emphasizes the need to understand the problem being solved rather than just the mechanics of coding. The author compares this shift to the evolution of 3D printing in manufacturing.

• LLMs flip the standard-library calculus: the default question becomes "is this worth a dependency?" instead of "is there a library for this?", since custom code is now cheap to generate.
• Unlike 3D printing, LLM-generated code has no inherent quality penalty versus hand-written code—if it's correct, it performs identically, unlike physical printed parts that sacrifice strength/precision.
• Design cost (understanding the actual problem/business logic) doesn't disappear even as coding cost collapses—LLMs don't grasp constraints on their own, so that burden stays on developers.
• The tradeoff shifts from dependency/version management to maintenance and vulnerability-tracking responsibility for more bespoke, less shared code.