I wonder if Amazon’s theory here is that by offering multi-cloud support they can put decision makers at ease when choosing cloud vendors by making them feel like they’re not getting locked into AWS - but Amazon also expects most customers to mostly only use AWS out of convenience Disclaimer - I used to work for AWS
MS SQL Server is a historical analogy. Microsoft could have run the table in the database market by porting to Linux but took years to overcome internal inertia required to run outside Windows.