Ask HN: Any good rails 5 starter app similar to hackathon-stater for Node.js app?

Hackathon-starter is one of very popular nodeJs starter app with close to 21k+ stars on GitHub. Are there any rails 5 starter app which has most of features such as authentication, authorization, admin, testing, payment processing, blogging, e-commerce and other features integrated to it? I have come across with a couple of rails starter app which do not have all features. Or community support is sparse.

1.What are the disadvantages for having lots of features?

2.Why rails community is not coming up with a starter app similar to hackathon-starter?