tl;dr: Iroh 1.0 is the first stable release of a networking library that replaces IP-based addressing with public keys, enabling secure, direct device-to-device connections that persist across network changes and NAT boundaries. The release locks in wire protocol and API stability, adds official bindings for Python, Node.js, Swift, and Kotlin alongside Rust, and includes QUIC multipath, NAT traversal, WASM support, and pluggable transports like BLE and Tor. The project's public relays have handled 200M+ endpoints in the last 30 days, with ~95% of connection traffic typically flowing directly peer-to-peer.