#Gitbutler now has it's own review system (compatible with GH PRs) from the creator of GH PRs.
https://blog.gitbutler.com/gitbutlers-new-patch-based-code-review/
So yet another external review system showing how broken #githubs PR system really is.
We now have #ReviewStack (does anyone actually use this), Graphite, and GitButler in the Github compatible alternate review system along with the client side systems (#jj, #ghstacks, #sapling, et al)
However I think GitButler totally misses the mark and continues the the sins of PRs into thinking that you need to groups PRs together into a logic unit.
Phabricator and Gerrit have both supported stacking diffs and the power of stacking was that a change could be related to a feature (i.e building up to implementing it) or just dependent on other features in the stack.
Forcing that a "branch" is has to be a single feature and your commits are reviewable but you still can't stack branches is STILL a hurdle to productivity which is the entire point.
Also no command line for gitbutler makes it my least favorite by far.