There are still some fairly clear (if unstated) boundaries that haven't yet been crossed. For example, Salesforce's partnership work with Microsoft could be best described as minimal, ever since Microsoft's attempted acquisition of Salesforce fell through and Microsoft beat out Salesforce to acquire LinkedIn. Similarly, AWS and its hyperscale cloud competitors aren't doing much in the way of strategic partnerships with one another, and are instead content to keep sniping at each other through public announcements and new product launches.