I’ve heard the US Forestry Service routinely swaps out the portable radio rubber duckies used on their portable radios. They have a cache in Boise Idaho (one of many? I don’t know) where they fill orders for the forest fire service. When the portables are returned it’s my understanding they routinely swap out the rubber duckies BEFORE they test each radio. The reason for this is due to the abuse these radios experience. And the rubber duckies are a main contributor to radio failure.
Rubber duckie antennas are deceptive in nature… they all exhibit the same non-destructive appearance because of their rubber capability to provide flexibility. And while it’s true, they will last longer than a metal telescoping antenna, they aren’t indestructible. They do in fact fail after being flexed, lasting longer when the flexing is minor and lasting less when the flexing is severe. They are much like a paper clip… you can twist it just so many times before metal fatigue sets in and they snap. And because the antenna is covered with the protective rubber material, we don’t see when that happens. Our first indication is usually poor reception and transmission, which we usually deem a fault of the radio and not the antenna.