That’s the power of vim, emacs, nano, and I think Kate too. Piping the current text and/or collecting the output of a given comment.

Another nice thing is the ability to collect paths, line and column numbers from the output for navigation.

For sure. I use Emacs regularly too, and of course it supports this kind of thing. BBEdit makes it flat out pleasant though. I appreciate how well the new additions melt into the UI.