yes, today. When it came out, it was missing some features that were enabled in the bigger models. I don't remember specifics, so I can't be more helpful here.
I'm fairly sure you're conflating the mini with the base model, and comparing it to the Pro. The Pro always has features which the base model lacks.
I don't remember there being any features, ever, which the mini was missing and the base model iPhone had. Might have missed it, but I'm going to need to see a link.