In recent years there has been a trend toward increasing workload density. A decade and a half ago, you would generally run one workload on one hardware chassis. While it was certainly possible to install different products, such as Exchange Server or SQL Server, on the same server running Windows 2000, administrators would generally avoid doing so unless they were deploying a Small Business Server-type solution. If you were doing enterprise IT on Windows systems in those days, you’d rarely see SQL Server and Exchange Server on the same chassis in a production environment. All that changed with the widespread adoption of virtualization.