>Oracle, for example, re-implemented Amazon's S3 API so that customers who built software for Amazon's cloud platform could easily switch to Oracle's rival cloud platform. So if Oracle wins here, they will get fu xx ed by Amazon?
Who knows. Does Amazon implement any of Oracle's APIs? This ruling is about to make the software patent mess look like a walk in the park.
They reimplement MySQL for Aurora Serverless, but losing Aurora Serverless MySQL probably hurts Amazon less than losing their S3 clone hurts Oracle, and in any case MySQL is GPL and Amazon doesn't redistribute their implementation, so they are probably within the license anyway.