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I think I see what's happening here considering how new the 50mm f/1.4 is. Sony probably violated an agreement with Zeiss and Zeiss is breaking off their relationship. Recent Sony replacements of Sony/Zeiss lenses
>PZ 16-35 f/4 in place of 16-35 Zeiss
>20-70 f/4 in place of 24-70 Zeiss
Expect to see all Zeiss lenses discontinued once the great replacement is complete