what will the museum of the future be like?
Hope this finds you well, and enjoying a good Christmas/New Year! I came across this old post of yours and just wanted to clarify something for the record. Very little of the business model of a museum CMS vendor is about software licensing costs. The real cost is the huge amount of support and bespoking that goes into the implementation of each instance of the software.
While Open Source solutions may or may not be more technically elegant (and many of the better-established outfits have fairly comprehensively updated their codebase in the last couple of years), the fact remains that many museums need more support in the implementation and management of their CMS than an open-source community is able to offer.
There is also the development path issue - most museums have at some point to commission bespoke development work either to integrate legacy systems or to make the CMS function as part of a web publishing workflow. Although the apparent benefit of open source is that the codebase is available, it is very often the case that the actual development community is either very small or non-existent - meaning that all users are dependent on the same core team.
I think people sometimes make the mistake of thinking that a Collections Management System is about the software. It is much more about the fit with the organisation, the specific functionality, the ease and availability of support and the cost of specific development. I fear that many open-source CMS (Collections Management System) initiatives miss the basic issue of the long-term support implications and focus instead on making software solutions.