What is a large-ish app? Just for comparison's sake? What makes it large-ish? The number of tables? The number of views? What is the problem that large-ish ap

What is a large-ish app? Just for comparison's sake? What makes it large-ish? The number of tables? The number of views? What is the problem that large-ish apps give that Rails solves? Genuine questions, I only do small projects and I honestly don't see a huge benefit to using rails, despite having used it before.