My guess is this is where the "off" part of the name kicks in. As in they've left the tracks and are no longer on Rails. As in they've moved beyond the Rails paradigm but are claiming to be a spiritual successor to the original philosophy.

To paraphrase Doc Brown, "Rails? Where we're going, we don't need Rails."

This is Rails with the AI-equivalent of a hover conversion and Mr Fusion to address perceived limitations of Rails.