It will go archaic before it loses its social prestige.
When a construction is the standard norm, but becomes unacceptable in the colloquial or popular registers, it tends to go archaic. It will go archaic before it loses its social prestige. When a construction is the popular or colloquial norm, but is unacceptable in standard, its future depends on how much it represents a real trend of the language drift, or, on the contrary, how much it is a mere fad, destined to fade away. In any case, it will take more time to acquire prestige than to become widespread; when it acquires prestige, it will supercede the previous, now archaic, standard construction.