This is somewhat along the lines of the current conversation, I was just having dinner when it occurred to me why Equestria has such
Schizo Tech.
Basic logic dictates that since Equestria doesn't have the same history and development as earth, it shouldn't have the same technology. Some of it would carry over, and certain things would likely be invented the same, albeit in perhaps different forms. This is, of course, because different cultures have different needs - while beds have existed everywhere, they take different forms in every region, and western europe never invented something similar to the rice flail because it was not possible to grow rice. And this is the key point here: Different cultures have different needs. Not only do they have a different history, when it comes down to it Equestria has a
radically different from anywhere on earth, by virtue of literal divine protection. For all the dangers in Equestria, the citizens are very safe, and the country peaceful. Necessity, as they say, is the mother of invention, and much modern technology originated from weapons technology (The atomic bomb was the first example of what atoms could do, for example). But Equestria never needed weapons, so they missed out on a lot of that. So, where does their necessity come from, then? It comes from ponies, of course! Ponies who want to do things that they just can't with current technology, need to invent tech of their own! That's why certain fields like music have excelled to modern standards, while other fields like travel didn't - who needs cars when you have pegasi carts?
Their are other parts of it too. Like, Equestrians seem to know very little of the world outside their kingdom, and have little desire to - so they wouldn't have invented a television, which was meant to improve global communication, instead settling for radio, which can only be broadcast locally anyways. The parts of technology that don't make sense, like hammers, may have been introduced by dexterous outsiders like griffons, or the rare visitor that does need them. I can imagine ponies wanting to have technology for the sake of having it, but their culture is extremely inclusive, it seems, so if they don't invent technology themselves, someone needs to bring it to them for it to perpetuate at all, and that's very rare.