- Added many new filters (network, listener, UDP, access logger, transform, MCP, geoip, Postgres) plus streaming HTTP callouts, ABI enhancements, and global module loading.
- Improved performance and observability: HTTP/2 header optimizations, container‑aware CPU detection, OTLP stats sink with metric dropping, stats‑based access logger, and process‑level rate limiting.
- Breaking changes include default HTTP reset code shift to INTERNAL_ERROR, altered reset behavior, Scrubber now returns 404 for blocked methods, and removal of several runtime guards; deprecated OpenTelemetry access log common config field.