I feel the comparison is really hard. Rails really is a framework that solves anything but the business logic for 80% of your app. React is really a library for

I feel the comparison is really hard. Rails really is a framework that solves anything but the business logic for 80% of your app. React is really a library for rendering components and everything else is your decision to pick or build from scratch. E.g. Rails has opinions on how to build forms while React, a supposed frontend framework, doesn't have anything baked in specific to that. Sure the community has opinions about it but React doesn't like Rails does.