Today was an important one. Milanto's mast was put back, having had the rigging replaced and the mast fully overhauled. She is now nearly ready for the new season. Yachts need regular and careful upgrades as safety is paramount. Stainless steel standing and running rigging has to be tested and checked every year or two [20,000 miles] and it is recommended that this is replaced every 4-6 years or 60,000 miles , as Navtec say: "The rig is no stronger that its weakest link".
They have a good article on Rod Rigging Life Expectancy.