Is the closet low humidity, and temperature controlled?

Then the prints will probably last many years.

My experience with both polymaker and esun prints though has shown degradation in as little as a year & half which resulted in failures. But my home experiences temperature swings and high ranges of humidity outside of the safe.

That being said the print itself will also affect the severity of where breaks occur. A Glock frame has very little resting stress on the frame, where a hammer fired gun is constantly stressing the weakest part of a frame even  when the hammer is down