do some research on ruby 4

Based on my research, here's what I found about Ruby 4:

Ruby 4.0.0 Release Information

Release Date: December 25, 2025 (official release)

Key Features:

1. Ruby Box 📦

• Purpose: Provides separation about definitions (namespaces)
• Status: Experimental feature
• How to enable: Set environment variable RUBY_BOX=1
• Class: Ruby::Box
• Functionality: Isolates definitions loaded in a box, can separate monkey patches and changes to global/class variables

2. ZJIT (Zero-Copy Just-In-Time)

• Status: Experimental (not production-ready)
• Purpose: Performance improvement through JIT compilation

3. Other Improvements

• Ruby 4.0 includes many other improvements beyond the major new features

Important Notes

⚠️ Production Readiness: According to recent analysis, while Ruby 4.0.0 was released, its best new features (Ruby Box and ZJIT) are not yet production-ready. This suggests you should be cautious about adopting these features in production environments.

Ruby 30th Anniversary

Ruby 4.0.0 release also coincided with Ruby's 30th anniversary (Ruby was created in 1995).

Where to Find More Info

• Official Ruby Website: https://www.ruby-lang.org/en/news/2025/12/25/ruby-4-0-0-released/
• Preview 2: Available from November 2025
• Analysis: https://www.devclass.com/development/2026/01/06/ruby-40-released-but-its-best-new-features-are-not-production-ready/

Would you like me to dive deeper into any specific feature or aspect of Ruby 4?