Indeed, the hope is that you notice that one of the zip ties breaks, before they all do.
Long ago I worked for a company that made molded plastic parts, and we conducted some of our product testing by literally putting stuff on the roof of our building for exposure to sunlight. I learned that black plastic fares better than the milky "natural" material. The black dyes prevent UV light from penetrating into the material.
Of course nothing lasts forever. I have a cable lock whose plastic covering literally shattered when I went to lock my bike at minus 20 degrees F this winter. I believe the combination of degradation from sunlight (a decade riding on my bike) and cold killed it. One thing it exposed is just how skinny the cable in a cheap cable lock is. The thick plastic covering acts like a magnifying glass, to make the cable look bigger than it actually is.
Also, I learned that if you use those stainless hose clamps, a bit of innertube rubber reduces rattling.