Chrome 142 introduced the Local Network Access permission prompt last year, and most developers shrugged.
Every few years the browser picks up a capability that reshuffles where smart people run their code. WebGL did it for 3D.
Every web app that accepts user HTML has the same dependency buried somewhere in its node_modules: DOMPurify.
Temporal reached TC39 Stage 4 on March 11. It's in the ES2026 spec.