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In the keynote titled "Beyond Ruby 3.0" delivered at Euruko 2021, Yukihiro Matsumoto, known as Matz, discusses advancements in the Ruby programming language, focusing on the significant updates brought with Ruby 3.0 and the future of the language. Matz elaborates on three major goals of the Ruby 3.0 release: compatibility, performance, and quality. He emphasizes that compatibility was prioritized to ensure that almost all 2.x programs run on Ruby 3.0 without requiring modifications. Matz reflects on past experiences with Ruby 1.9, where incompatibilities caused community disruption, pointing out that breaks in compatibility can be detrimental across programming languages, citing examples such as Python 3 and PHP 6.

Key Points Discussed:
- **Release of Ruby 3.0**: Introduced on December 25, 2020, Ruby 3 aims to improve concurrency, performance, and productivity.
- **Concurrency**: With the introduction of Ractor, Ruby can manage parallel executions without being hindered by the Global Interpreter Lock (GIL), allowing better multi-core utilization.
- **Performance**: The JIT (Just-In-Time) compiler, along with enhancements in garbage collection, aims for a threefold increase in speed for certain benchmarks, improving the overall efficiency of applications.
- **Static Typing Tools**: The language incorporates tools like RBS for type description and TypeProf for generating type signatures, aiming to enhance type safety without rigid syntax constraints.
- **New Features**: Introduction of pattern matching and numbered parameters allows for cleaner coding practices.

Matz underscores the importance of maintaining compatibility, addressing historical challenges faced by other programming languages, stressing how developers prefer minor application changes over potential disruptions due to language upgrades. Matz hopes Ruby will continue to facilitate enjoyable programming experiences and encourages developers to be active in the Ruby community, reinforcing a collective effort towards improving the language. The session concludes with Matz inviting questions from the audience, reinforcing engagement and community spirit.

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