Larry and the Oracle execs truly hate SFDC. They really build up the rivalry internally to Oracle employees and paint Salesforce as the big rival that everyone needs to band together to beat. Combined with the duplication of products that would occur if Oracle acquired Salesforce I would be beyond shocked if it ever happened. At that point Salesforce would be so irrelevant that it wouldn't matter.
In my experience, things you described are probably true, but they have nothing to do with acquisition. Actually it is very much desired (Larry was hating PeopleSoft a few years ago... and see what happen).
And duplication of products was never a problem for Larry: he just kills the one with less customers. For example, in case of BEA and Oracle Application Server: BEA WebLogic replaced Oracle Application Server.
In this case, in case of acquisition, Oracle cloud offering will be replaced with Salesforce.
