From The Verge:
Google isn’t totally out of smart home security, though. It still sells video doorbells, security cameras, smoke alarms, and more.
Unless you’re using something that is absolutely mission critical to Google, prepare to have the rug pulled out from under you. Good on them for continuing to support the platform for now but you can already see the “sunset” blog post 12 months from now.
While Google might argue its new system will be good for users in the long run, the fact remains that customers spent money on a product, and Google is taking that product out of customers' hands and replacing it with something different. In effect, Google just unplugged many of its users' smart homes, all while asking them to kindly move into a new, Google Assistant-branded tenement. In the long run, Google assures us, things will get better. Its track record with killing products doesn't inspire confidence.
I found myself nodding my head a ton while reading this article. I’m moving to Alexa/Sonos over the next few months.