>>If you'd point me to a resource to answering this question, I'd appreciate it.
>
>I don't know of any resources, but I can think of one reason really quickly- If the dll is designed to run on a workstation, (not DCOM or MTS) and don't need it. If a component is truly designed for mt, there are special considerations, like state, that you don't need to deal with in a single use server.