From what I figure, we should all swap our fire alarms wit the Europeans. Theirs go off only in the middle of the night, like ours. If we swapped, it would be daytime when they start beeping.
Smoke detectors do indeed had a finite life. And the difference from the cheapest Chinese to higher quality units is real. Don;t buy the super cheap ones unless you are willing to bet your life of crappy quality chineseium grade products.
https://www.techgearlab.com/topics/electronics/best-smoke-detector#best-overall-smoke-detector