These operations are already supported by using structural regular expressions. As an example x g/foo will select all lines containing foo. Similarly

These operations are already supported by using structural regular expressions. As an example x g/foo will select all lines containing foo. Similarly x v/foo will select all lines not containing foo. Sorting etc. is taken care of by piping text through external tools. I was more interested in common editing tasks for huge files which according to this thread a lot of people perform using sublime text.