My understanding is that collaborative live editing à la Google Docs was already here for Microsoft Office? E.g., I routinely edit the same Excel file from my i

My understanding is that collaborative live editing à la Google Docs was already here for Microsoft Office? E.g., I routinely edit the same Excel file from my iPhone, iPad, and Mac. My current understanding is that live collaborative editing is the solution for the same problem version control solves for non-plain text file formats (and therefore, also the solution for non-programmers). Think of how much programmers complain about the complexity of git, and that's using it with plain text, a format that facilitates version control like no other. For collaborating in every document format that isn't plain text, my solution has been to use live collaborative editing.