I've been there. My mum has a holiday home where a smoke alarm was beeping for ages. I eventually took it down as it was old. These things have a life as the radioactive detector decays. The beeping can drive you insane, but my mum probably didn't hear it. It's worst when it started in the middle of the night. You don't want to be climbing ladders then.

I've got a Google Nest alarm here and they are alerting me that it reaches end of life soon so I need to get a new one. Not only that but the heating controller from them won't get supported after this year so I have a new one to install.