Springs either work or they don't.
But why wait until they don't? Knowing my luck, the spring will stop working at a time I need it most, like when my life depends on it.
What if you change out a working spring for one that has flaws?
Of the dozens upon dozens of gun springs I've changed in my life time, that has happened exactly.....zero times.
Preventative Maintenance. I do it for a living. Works on million dollar equipment, works on a $500 pistol just as well.