For the Oracle example, big, old-school companies like this are definitely the hardest to get onboard. However, there are examples of large enterprises adopting standard contracts, including:
The biggest banks in the world trade derivatives using the ISDA master agreement (here's an example of Bank of America that they filed publicly: https://www.sec.gov/Archives/edgar/data/1065696/000119312511...)
The largest ad platforms and advertisers use the IAB standard terms, often with a short addition specific to their company (Here's an example from Disney https://disneyconnect.com/dpep/disney-ad-guidelines/)
We've already seen examples of Fortune 500 companies signing Common Paper agreements, and we're hopeful that it will become more and more accepted by them over time