Open systems are economical
It is economically advantageous to build external information on open software. For example, it saves on licensing costs. This money can instead be spent on adapting the sites and systems to the business. In many cases, we can build websites for the same money as the cost of licensing the major proprietary licenses alone (they also have to be customised later, at expensive cost). It's cost-effective!
Often we recommend work is done in small steps when building new systems. "Small steps - small errors, big steps - gigantic errors" is a quote we often use.
By using open source software, you can start with a low initial cost and then let it grow at the pace the business needs.
