> notes die when you don’t engage with them

That is an interesting idea, but not something I would ever want in a notes app. A note may be important but never opened.

For example, I have a note in Craft with my bike serial number and a picture of me standing next to it. If my bike is ever stolen and recovered, this note is proof of ownership. I have not opened this note since creating it, because my bike has not been stolen, but I would obviously hate to lose it.