Serverless architecture does not mean that there are no servers. Servers are definitely involved but you do not have to deal with them. NorthStack Serverless Architecture offers an incredible development experience which you definitely need to explore.
WPEngine Smart Plugin Manager runs on your website at a specific time daily. It checks for updates.
If there are plugin updates available, Smart Plugin Manager does not go ahead and updates the plugin. Instead, it first creates a backup of your website.
Host.io collects data on every known domain name, from every TLD, and updates the data every month. The data includes Domain Name Service (DNS) records & website data for each of the domains.