Setting aside the feature comparison, there's the matter of inertia. There are tons of enterprise-quality software packages that already work happily with Micro

Setting aside the feature comparison, there's the matter of inertia. There are tons of enterprise-quality software packages that already work happily with Microsoft SQL Server, and the cost of switching the application to use another database is too high. (Especially in enterprises where you may have dozens of different applications all talking to the same database simultaneously, and switching them all at the exact same time would be incredibly expensive.)