> I'd recommend clicking through the headline to watch the talk. Metz talks a lot about types of similarity: similarity by coincidence vs similarity due to an actual semantic or functional equivalence.

I've seen this article and AFAIR the video before, and FWIW having been a Rails developer from the very early days and fitfully until maybe even 2014, I now interpret the phrase "my Railsconf talk…" quite negatively.

ETA: nice to be back to disagreeing with people on HN about coding principles again though. Hopefully this is a sign.