Rails 8 Guide: Features, Requirements & Upgrade Path (2026)
Summary
Comprehensive guide to Rails 8 and 8.1, detailing requirements, new features, and upgrade paths from Rails 7.x. Highlights include built-in authentication, database-backed adapters (Solid Queue/Cache/Cable), Kamal 2 deployment, Propshaft, and SQLite production readiness. It also covers version support timelines and upgrade steps.