We switched to using https://graphite.dev/ after yet-another huge epic that caused a mess of PRs and one PR that touched 100+ files and included dozens of semi-related changed. It's been a blessing so far.
Graphite is amazing! Would definitely recommend everyone try it at least :)
How is Graphite? Does it solve the problem of stacked diffs well? I loved the CR tool at Amazon where I could create CRs for arbitrary commit ranges, and I really want to find a similar tool.
Little suspicious of a tool with no pricing information from a company that just raised $20 million. I assume it will not remain free.