YSK Your smoke detectors should be replaced every 7-10 years

https://slrpnk.net/post/34507518

I’m genuinely curious: why do you need smoke detectors? I’m asking as an european that has lived without them all their life in more than one country. They are not mandatory here and not even common. What’s the reason to install ther? (I know the reason is to detect smoke, I’m asking the underlying reason behind the need to detect smoke)
Possibly a difference in construction materials. Most stuff in the US is made of wood and other flammable materials. From what I understand, brick/stone based materials are the most common in European buildings.

Wood as a construction material is not really the problem, it burn fairly slow. The problem is our furniture and other stuff changed from wood to MDF and petroleum based based products, reducing the time you have to react from 15 minutes to 3 minutes.

If you look at a map of where smoke detectors are mandatory and where not in the EU, it’s more about rich vs poor: q-certified.eu/…/smoke-detector-legislation-in-th…

Smoke detector legislation in the European Union | q-certified.eu

In Germany, Austria, Great Britain and Ireland, smoke detectors are broadly required in private living spaces. In many EU countries, however, much still needs to be done to protect homes by installing these life-saving devices.

Q-Certified
Nah, OP is just a troll. Most European countries by now have legislation to mandate them or are currently introducing these. All of them heavily advise them.
EU Fire Safety Guide - Modern Building Alliance

The 7 layers approach of Fire Safety in Buildings. The Guide presents the 7 layers that must be concidered to protect citizens and buildings.

Modern Building Alliance