Yesterday while cooking I set off the smoke detector, no I did not burn anything. They go off when I cook over a high heat. And yesterday once they started going off they would not stop. I ended up having to disconnect them all (they are hard wired with an interconnect) and I replaced them this morning. Aaaaaaaand let me tell you, I had a sleepless night last night knowing there were no detectors installed.
https://www.southernliving.com/how-often-should-you-replace-smoke-detectors-8774122
Your third source is about the 2020 follow-up study of the 2017 study in your first source. You’ve “only” got three independent sources even though it looks like four (“only” in scare quotes because three is still plenty).
A follow up is a absolutely regular thing and does not diminish neither study.
I didn’t say they were diminished. I said they weren’t independent.