And people will keep using StackOverflow for AWS questions anyway.
As long as StackExchange keeps publishing under Creative Commons, I don't know why anyone would bother making their own Q&A forum, even a platform as big as AWS. Programmers would rather have a one-stop-shop for all their questions, which often cut across multiple topics anyway.
As a StackOverflow consumer who only lands their from search engines, I am tired of seeing what seems like legitimate questions closed for being opinions/already asked in prehistoric times/etc. If Amazon owns a platform, they can enforce their own standards which might allow for more relevant posts.
As long as StackExchange keeps publishing under Creative Commons, I don't know why anyone would bother making their own Q&A forum, even a platform as big as AWS. Programmers would rather have a one-stop-shop for all their questions, which often cut across multiple topics anyway.