I remember a few years ago I shared a Google spreadsheet among a few coworkers so we could all see and edit the same thing.

The amazing utility of being able to see the location of everyone's active cell, and seeing each person as a different colour, was just wonderful. Combined with a voice channel and it was more useful than a face to face meeting in a conference room.

This inspires me to try to get the editor sharing running for my tiny DevOps team.