This could be an issue if you have the "T" type terminals on your rigging
As a Flotilla skipper
many (many) years ago I had a fleet mast
come down under sail in the Greek Islands
I recovered the mast
and on inspection
saw the lower shroud
"T Bar" had snapped off. I inspected the rest of the fleet, and discovered more Port lowers with hairline cracks on the "T" terminals.
The fleet had been operating the previous year on a "training area" route
where the winds were very light so the boats had been motored a lot. The fleet had also had new tanks
installed on the starboard amidships. This had caused the boats to heel slightly to starboard, putting tension in the port lowers.
the port lowers "hummed".
We could only presume the harline cracks were the result of these terminals doing x years more work
than the rest of the rigging
NB. The story of the mast coming down & subsequent recovery is fun but not relevant to this thread...