It’s not just a backend, Rails is a full stack framework - from database administration to data modeling, business logic to frontend. It literally has built in

It’s not just a backend, Rails is a full stack framework - from database administration to data modeling, business logic to frontend. It literally has built in frontend templating in the form of erb. That said, I think that frontend development has evolved into a place where frontend development is better done separately. As part of its evolution, Rails integrated Rails API and can be configured minimally to be a backend API only.