It's been 2 years now since the last update on the changes for Works with Nest.
Google did not give us a reason why they had to change it, no updates on how long we have to wait, no reason why they are not able to perform this update without leaving a gap, they gave us no reason for anything.
Just admit you don't care at all to give users the ability to connect your Nest Protect with literally anything.
We appreciate your interest however, we don't have any news to share about connecting your Nest Protect with other softwares or smart lights. We're always looking for ways to improve and we'll take it as feedback.
I also suggest that you send feedback by following this link. Let me know if you have other questions or concerns, otherwise I’ll be locking this thread after 24 hours.