tl;dr:"As the founder of a developer tools startup, I’ve talked with hundreds, if not thousands, of software developers in the course of routine user research." Jean presents the "truths" about building enterprise software for "99% developers," the ones working outside of "hip companies and frameworks": (1) Smaller companies attempt to the imitate tooling of FAANG companies despite different resources. (2) There is no gold standard development environment. (3) The goal is progress, not perfection, and more.
tl;dr:Developer Experience is the sum of how developers interface with their tools. Tools fall into 2 categories: (1) Abstraction tools make re-usable models e.g. APIs. (2) Complexity-exploring. Tech stacks are messy and becoming messier, and present an opportunity for "observability" tools beyond logging and tracing. Jean provides characteristics of a good tool, and advice for buyers and users.