The issue I've run into with graphite, for example, is that it gets confused by things like squash merges. I think fundamentally a merge-based workflow, which

The issue I've run into with graphite, for example, is that it gets confused by things like squash merges. I think fundamentally a merge-based workflow, which git(hub) encourages, is kind of inimical to stacked PRs compared to rebase-based workflows.