Roughly the original idea was similar to https://en.wikipedia.org/wiki/Single_system_image That is, make a cluster of machines look like a single BSD instance, by allowing virtual memory to span multiple machines, processes to move, etc, all while preserving cache coherency.

Obviously this is an insanely difficult goal, which is why DragonFly didn't make it particularly far towards it. Additionally we've seen the rise of virtualization and systems like k8s for managing clusters, which would reduce interest from potential collaborators.