Also in the piece, "Jonathan Rochelle, the lead product manager for Google’s suite of collaborative tools from 2005 to 2013, said that he and his team found tha

Also in the piece, "Jonathan Rochelle, the lead product manager for Google’s suite of collaborative tools from 2005 to 2013, said that he and his team found that having more than 25 to 50 editors on a single document made it hard for people to collaborate effectively." The technical limitation is 2-4 times what the former product manager believed was a human limitation already. Scaling beyond that doesn't seem like a priority.