After some time, elements are wearing off and need to be replaced to get back to 100% efficiency.
Wearing off occur each time an element is repaired.
Dev update: we will introduce a loss of efficiency up to 5-10% that slowly increases each time an element is repaired. Also, total destruction will be limited to 3 times, after which the element is not repairable anymore and must be replaced. Replace will be possible without loss of configuration or links.
Done Medium Dev Cost