LTD is the king of circular arguments. Trying to have an honest discussion with him is an absolute exercise in futility.
You could probably assume that he's been using Macs since the days when Apple was floundering. Back then, if you were to bring up the fact that all these various computer companies sell 100x more Windows branded PCs than Macs, he'd probably pull the old "quality before quantity" argument. You know the spiel. "Just because they sell more, doesn't make them better. The idiots can have their more popular platform. I prefer using a computer that Just Works".
But now that Apple is the current darling of the tech industry, then it becomes SO VERY OBVIOUS that consumers prefer the quality only Apple can provide, and the fact that some other company isn't doing quite so well is proof positive that it's a subpar product.
Basically, the guy doesn't have an original thought in his head. He'll start off with "well, Steve said X, so Y can't be true", taking it as gospel truth, without thinking about WHY, then hit one of his many variations of the above stated sales BS if you back him into a corner. He really doesn't offer anything to a conversation besides getting people riled up.
If you value your sanity, it's best to just ignore LTD. You can't win an argument against someone like that, because they're not really thinking, they're just sprouting off at the mouth.