You can still think of AI as one facet of Graphite's product that you can use or not depending on your work style. Stacked PRs are still a core piece and not going anywhere :)
Except for the undismissable "Pay use more to enable AI reviews" nag that Graphite places above your CI checks and assigned reviewers.
Except for the undismissable "Pay use more to enable AI reviews" nag that Graphite places above your CI checks and assigned reviewers.