DynamoDB is not directly portable, Cassandra is closest, and it's a bear to roll your own. Are you an Amazon employee outright telling people to not use the fundamental datastore of AWS?
S3 also is fairly proprietary, are you, an Amazon employee, outright telling people to not use the fundamental file storage of AWS?
I could go on, obviously.
S3 is blob storage. Dynamo is a key value store with support for additional indexes. Neither technologies are particularly novel today or provide specific features that would lock you in. You could use comparable technologies on Azure or Google Cloud. Like I said before, you can’t blame Amazon or any cloud provider for poor design/architecting on your end.
Your questions are written as sarcastic personal attacks, which you write instead of posting something of more substance. It seems like you’re just trying to incite a response from me aka trolling. I won’t engage with you anymore. Good luck.