Exploding Pyrex

So my wife is obsessed with "Old Pyrex", which seems perverse at first blush. The older Pyrex kitchenware has patterns and designs that appeal to some folks. But the main reason I think collecting Old Pyrex isn't a total waste is that apparently the newer Pyrex isn't "real"—it's licensed by Corning to World Kitchen and doesn't have the same composition. There have been cases of it exploding when used in the oven or microwave, even if labeled safe for those applications, and that's very uncool.