Really excited to try this. After using Graphite it's been very hard going back to stack-less GitHub. Hopefully this can make the stacked PR workflow more common and give people an easier alternative to mammoth PRs.
git-spice is specifically targeted to be useful for PR stacking and doesn't require you to do anything differently from normal git operations that you likely use already. It has a bunch of really nice flows and doesn't try to step outside the bounds of what is needed to easily stack PRs