I’ve been shouting from the rooftops for years that “newfangled fancy aftermarket” CS springs bring rust to the equation while solving no real-world problems. They will, of course, last a long time in the right conditions.
LMT e-bolts seem to last an absurdly long time, even with thousands of dangerously overpressure loads involved. I think both of mine have outlived 2 barrels each. I’m sure Knights bolts are the same, or more likely, “better”.
We’ve seen from my “who breaks bolts anyway” thread that this is irrelevant for the majority of people that start with a quality rifle, and bolts cost less than the ammo required to break them, even if you add barrel cost to that. Of course, one breaking at the time of Murphy’s choosing would be lame, so it’s reasonable to buy quality and have a maintenance and inspection plan. Not worth agonizing about, though.