Comment by soveran

I use it daily. I run a slightly modified version: I added line editing capabilities with linenoise and I use EREs. The most common use case for me is editing with :g/re, which allows me to see only the matching lines. If I want to keep only those lines, I type :v/re/d, and so on. I also invoke it regularly from my main editor when I find it more efficient for modifying some file or some region.