Why is the new 50/1.4 three times more expensive than the old one?

Nordstjernen wrote:

Wide open softer than Sigma, and not the same smooth bokeh. But stopped down, better than the Sigma. The Minolta/Sony was a very good 50 mm bright prime when it came.

The question is: Do you use your 50 mm wide open (Sigma) or stopped down (Sony)?

Hope the Zeiss is great at all apertures, since I really like this focal length and the aperture blades on my Sony 50 mm f:1.4 is stuck forever. Would be great with faster focus and SSM too, and I think all Zeiss lenses are built for long time everyday use.