An emphatic yes! Of the many benefits of upgrading to SQL Server 2005, there are many that database administrators will get for "free" -- that is, without any change to code and with minimal change to system configuration. These benefits include every DBA's favorite type of enhancement: performance optimizations. The SQL Server Engine team describes some of the optimizations made to tempdb in this blog.
Many other enhancements also come with nothing more than a simple upgrade, including many features that will help in the areas of security and manageability. Don Vilen, SQL Server Program manager for Microsoft, details some "transparent" upgrade benefits, in this archived TechNet webcast.
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This was first published in September 2005