Symmetric A/B — two equal root filesystem slots — is the right default for most connected products: install to the inactive slot, reboot into it, and fall back automatically if the new software fails its health check, all while the device keeps running during the write. Limited storage, slow boo...
Source: [Dev.to](https://dev.to/raghu_bharadwaj_404e60eb0c/choosing-an-ab-update-layout-for-your-product-8en)