Not necessarily, but Rails is much more a productivity marvel than a technical marvel tbh. This is as it should be for a productivity oriented tool, not surpris

Not necessarily, but Rails is much more a productivity marvel than a technical marvel tbh. This is as it should be for a productivity oriented tool, not surprising users with technically advanced stuff is a feature in that case. And sure, some of the engineers at Github/Shopify/etc are super qualified but from my personal experience in the Ruby ecosystem (5+ years and counting) there are WAY more autodidact freelancers who can throw up new websites in minutes but still struggle with computing the algorithmic complexity of linked lists than there are CS graduates who have a solid grounding in data structures and algorithms. In such an environment, it is not surprising that many of the available libraries are very business-oriented but not very optimized.