Even with plain text CSV files one can detect that a given cell was changed, have md5 checksums of files, etc. In a day to day use where users often share their

Even with plain text CSV files one can detect that a given cell was changed, have md5 checksums of files, etc. In a day to day use where users often share their edits using emails just figuring out which is the correct and most recent copy is a fools errand. In some settings the sheets are just a giant white boards: different parts of the same sheet can contain partially replicated and not cross-checked data. Samples in columns, so each row is a different type. "Free flow of thought" or annotations of say numerical cell with text in the same cell. All this steams from the fact that users do not see the data as something to be queried and compared but as a board one can just look at.