Need to say something lest someone get the wrong idea.
This is just incorrect, with all due respect.

Consult any mechanical engineer:
With good springs, it's cycling that wears them out, not compression over time. Don't just believe me - anyone who doesn't know about this should really consider reading up on the subject. Google is your friend; call the local university and talk to an engineer.
Many of our members here can probably tell you of leaving magazines loaded for decades, and having them work flawlessly nevertheless. This is not a valid reason to scare someone away from semiautos.