[corytheboyd]

I think some abstractions are fine and warranted, even ones you yourself come up with. Rails is a framework consisting of tons of opinionated abstractions. We need mental models to grasp complicated, large codebases.

My point is more to think twice about adding your own, and after thinking twice about it, think about it ten more times. Most people using Rails will already have an understanding or mastery of the abstractions you mentioned, but that understanding guarantee drops off quick with third-party gems, and is a guaranteed no for custom in-house solutions.