The author doesn't justify it but I suspect the thinking is related to how fixes are prioritized. If there is a bug/performance issue that only happens in the

The author doesn't justify it but I suspect the thinking is related to how fixes are prioritized. If there is a bug/performance issue that only happens in the context of AWS, then Corretto would be the most likely to rapidly patch the issue as it impacts their customer base. Potentially patches for those sorts of issues would be discovered by AWS through their own use and testing. Likewise for the other vendors and their own platforms.