The harsh reality is that software development is messy. You start with the best tools, the best architecture and the best intentions, but quality inevitably degrades over time. Frontend code is particularly fragile in time as it sits at the intersection of product, design and engineering. A while ago I started asking myself if all codebases are destined to fail and become legacy or obsolete. Then I began collecting lessons from past wins and failures and noticed how important resilience was to the success of a long term project.
Resilience is the ability of a codebase to survive through waves of chaotic development and unplanned changes. Resilience has less to do with the tools and frameworks you deploy, and more to do with the discipline of writing and maintaining clean code. Have you ever wondered how much work will be required to update the code you are writing today, 6 months from now? Let's see if we can answer that with a simple: "not too much".