It's not security through obscurity, it's security plus obscurity. It's a very real fact that if attackers can't find your bugs, they are less likely to exploi

It's not security through obscurity, it's security plus obscurity. It's a very real fact that if attackers can't find your bugs, they are less likely to exploit them. Apple are well versed in writing secure code, but they slip up sometimes. It seems their calculus at this time is that the time gained by not allowing attackers easy visibility into their code is worth it, in case bugs are found. I don't fully agree with that choice, but I can see why they made it; it is not meaningless.