Although the following is a little outside the mainstream of Open Enterprise, it does have a very clear moral with direct relevance to this blog's readers. It concerns the proprietary program Sibelius, which describes itself as "the world’s best-selling music notation software". It only runs on Windows and Macintosh, and comes with an oppressive DRM that places it about as far away from free software as is possible. Nonetheless, it seems widely-loved by most of its users, presumably because it does what they want it to.
On Open Enterprise blog.