"What are the most common problems encountered in migrations from proprietary to open source security?
"Field: The most common problem is the actual installation of the open source software package. Proprietary packages, however poor their performance and functionality might be, have developers who usually spend a large amount of time and effort creating the installer (using a closed-source installation package). The costs of the most common installation systems are beyond the funds available to the open-source community, and so installation is often slightly more awkward, relying more heavily on the knowledge and skills of the engineers installing the software..."