Opening Keynote
summary
Starts from one user in 1993 and traces growth to roughly one million Ruby users and a ~650‑person RubyConf, citing the Pickaxe selling ~20,000 copies. Announces concrete engineering work: a new Guild concurrency model that isolates objects to enable parallelism without removing threads, a plan for duck inference (structural typing with inference, 80% coverage target and runtime/test fallback), and Ruby 2.4 wins—faster hash, integer unification, Unicode case mapping and OpenSSL 1.1 support.
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