While Rails 8 modernizes asset management and background processing, Inertia.js modernizes the view layer. By replacing ActionView with React components while keeping the controller-state-flow intact, Inertia eliminates the need for an intermediate API layer, significantly reducing your application's surface area.

What Problem Does Inertia Solve?

When teams move from classic Rails ERB views to a React frontend, they typically face a fork in the road: either maintain a full JSON API (with serializers, authentication tokens, CORS, versionning headaches) or keep the monolith and sprinkle in React component islands via importmap or jsbumdling-rails