It was trendy few years ago, and it's a general idea, it's a bit like jquery progressive enhancement over a webpage, you don't change the whole UX, you just complement/enhance the parts slightly.

As a comparison, VSCode git extension adds a side bar with it's own subsections, and buttons with slightly obscure iconography and meaning, would also break usual git workflow (afaik you cannot edit a staged file and restage, it will complain).

Magit, afaik, never does this, it reuse the outlines of git output, it just parses/reuses the local information under the buffer cursor/line and fill in the details for you so everything is one key away. It's like ast interpreter vs bytecode.