I'm thinking your post would benefit from a recommendation as far as the "next closest thing" to MSSQL, since you're exhorting DBAs to make a transition, and minimizing friction would be an important aspect of it.
> I'm thinking your post would benefit from a recommendation as far as the "next closest thing" to MSSQL
Then by all means, add it in the comments and I'd be glad to point to it. I'm just not qualified to make that recommendation myself. My experience with other platforms amounts to importing data into MySQL for WordPress, heh.