Much of the resources of digital preservation have been devoted to preparing for formats to go obsolete and require migration. I’ve been arguing for a long time that this isn’t a good use of resources. Before the web, formats used to go obsolete quickly, but since the advent of the web in 1995, it is very hard to find any widely used format that has gone obsolete. The techniques we have had for a long time, such as open source renderers and emulation, work well enough to cope with format obsolescence if and when it eventually happens; further work in this low-leverage area is a waste of resources. The most important aspect of the way that format obsolescence became not worth working on is that digital preservation had nothing to do with it. Formats stopped going obsolete for very fundamental reasons, not because digital preservation prevented it. Virtual machines and open source became part of mainstream IT for reasons that had nothing to do with preservation.
Open Source considered helpful for digital preservation...at least for rendering.