I hope this thread will be result in a mains powered Matter smoke alarm with wireless interconnection to other alarms.
If it comes then I will switch all my Cavius smoke alarms, which I can only monitor over 868Mhz and it is one way communication. What is worse is that the alarms only transmit when there is an event, like an alarm or a low battery warning, which can be years apart, so in the mean time I am sort of worried if they work at all.