The modern requirements vary based on locale, and will crop up at sale time: https://www.homelight.com/blog/are-smoke-detectors-required-when-selling-a-house/

The modern requirements vary based on locale, and will crop up at sale time: https://www.homelight.com/blog/are-smoke-detectors-required-when-selling-a-house/ https://www.homelight.com/blog/are-smoke-detectors-required-... So yeah, I don't remember having many as a kid either, but fast forward 30 years and I had to buy a bunch to sell my house.