> For example, if I write exploratory code to test out a feature or throwaway code to do some analysis—anything I might want to use again, but don't want to commit to the codebase—I'll add it as a commit and then immediately revert the commit (i.e. make a new commit that deletes what I just added).

Why not use a named stash for something like this? It'll keep your history cleaner, and you can always find the stash by name later.