Yes. It's still a very good framework for simple Web Apps. It's takes care of a lot of boilerplate. With Rails 5, it's good for a simple API backend as well.

Yes. It's still a very good framework for simple Web Apps. It's takes care of a lot of boilerplate. With Rails 5, it's good for a simple API backend as well. And there are a ton of gems that can alleviate a lot of pain. It's when something non trivial where Rails may not be a good choice.