Depending on people workflow/mindset we often face stacked branches, lots of fixup commits, and over the years new git commands and tricks emerged to deal with

Depending on people workflow/mindset we often face stacked branches, lots of fixup commits, and over the years new git commands and tricks emerged to deal with that but not in cohesive way I guess. JJ seems (I only tried it a short while long ago) to address just that.