WebAssembly WASI 0.3 and SpinKube — After Containers Comes Wasm

Solomon Hykes' Prophecy Becomes Reality In 2019, Docker co-founder Solomon Hykes made a prescient statement: if WASM+WASI had existed in 2008, Docker wouldn't have needed to be built. That prophecy moved closer to reality in 2026 with the standardization of WASI 0.3.0 and the SpinKube project. WebAssembly (Wasm) was originally created to execute C/C++ code in browsers, but with the arrival of WASI (WebAssembly System Interface), it's now seeing serious server-side adoption. As of 2026, Wasm is rapidly emerging as a container alternative in serverless, edge computing, and microservices domains. WASI 0.3.0 — Completing the Component Model WASI 0.3.0, released in early 2026, marks a decisive turning point for the WebAssembly ecosystem. While the previous version, WASI 0.2, defined the basic structure of the component model, 0.3 adds async I/O and streaming support—providing the final puzzle pieces needed for real server workloads. The core of WASI is its capability-based security model. U