What's crazy about it? Outside of the US and UK the XBO doesn't present much competition to the PS4, and the console clearly still sells very well at it's 300$ pricetag.
A pricecut will come if the PS4 drops too deep or if the Switch starts catching up in Sonys home turf Europe, but not because the XBO dropped it's price again. Because while it helps the XBO getting maybe it's best year yet, it's still far from threatening the PS4 on a global scale unlike the Switch does.
Sony is just sitting back, filing their nails, and letting Xbox be the loss leader.