The knowledge gap is how much industry knowledge there is about how MySQL preforms in large scale applications, and the amount of people who can help you tune i

The knowledge gap is how much industry knowledge there is about how MySQL preforms in large scale applications, and the amount of people who can help you tune it. Because MySQL has such a large deployment base there is a whole industry around performance tuning and its easyt to find an engineer who has experience using it. Even if they were technically equal which they aren't that one aspect alone would tip the scales to MySQL