"Who should I ask about <feature>?"
```
$ fd --full-path <feature>\
| xargs git log --format='%an' --no-merges\
| sort\
| uniq -c\
| sort -nr
```
This is pretty unsophisticated. It spits out commit authors sorted by how many commits they have which change files with the search string (<feature>) in their name. Despite the lack of sophistication it's come in handy a bunch of times.