Support for the Dropcam and the Nest Secure home security system is ending in one year, after which you won’t be able to access them from the Nest app.
Matter is an interoperable connectivity standard for smart home devices developed by a consortium of about 300 companies, including Apple, Google, and Amazon
Google's 2nd-gen Nest Doorbell has always-on power, optional 24/7 video recording, and smart features like people/package detection and Activity Zone tracking.