Rails 8 Guide: Features, Requirements and Upgrade Path (2026)
Rails 8 introduces asynchronous query loading, built‑in encryption helpers, and a shift to Ruby 3.3 as the default interpreter. The framework drops support for Ruby 2.7 and older JavaScript runtimes, requiring modern browsers and recent database versions. The guide outlines a staged upgrade path, recommending dependency audits, test suite validation, and incremental migration of legacy code to ensure a smooth transition.