The legal minimum (for rentals) and the fire service recommended number of smoke alarms are vastly different. Like you, every room has a smoke alarm except bathroom/toilet. We have heat ones in the kitchen and garage and regular ones elsewhere.

Thanks for the reminder about fire extinguishers. My plan had always been to buy another every few years so they were different ages, but I’m sitting here with only one in the house because I never got more. I should get on to that.