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Antediluvian
Outmoded Impressions
Conveys a judgmental tone when referring to something extraordinarily outdated or old-fashioned. 
Beyond Obsolete
Stronger than 'old-fashioned'; implies something is so outdated that it's almost incomprehensible today. 
Hyperbolic Usage
Often used hyperbolically to exaggerate the age or state of obsolescence of an object. 