Richard talks with José Valim, creator of the Elixir programming language, about the differences between gradual typing and static typing - including whether gradual is the best of both worlds.

Richard talks with Predrag Gruevski, author of the cargo-semver-checks tool for detecting accidental semantic versioning mistakes in Rust packages, as well as Trustfall, which is an incredibly flexible query engine. They talk about why semantic versioning is so especially tricky to get right in Rust, tradeoffs in different package managers' approaches to semver in general, and how his work on cargo-semver-checks motivated him to create a tool for querying data in just about any format.

Richard talks to Chris Krycho about TypeScript's unusual take on semantic versioning, and type system complexity tradeoffs between various different languages.

Richard talks to Daniel Lemire about his work on simdjson, arguably the fastest JSON parser in the world. They also talk about parsing performance in other contexts, benchmarking, NodeJS string representations, and textbook approaches to performance versus real-world experimentation.

Richard talks with former Rust core team member Ashley Williams, aka ag_dubs,, about various different types of niche domain knowledge - from CSS tricks in web development to low-level systems programming, package managers, and even organization-specific domain knowledge.