I introduced the idea of tasks mostly as a generic thing, for task-tracking applications that are not git-specific.

However, I also imagined that there are people using NIP-34 issues already, and that they might want to track them in a workflow. So in the "XXD" draft, I introduce workflows that can track any nostr kind, including git issues and more generic tasks. The intent was to keep compatibility with NIP-34, but also provide a more generic task type for non-git applications.