Excel's braindead csv corruption is why I never use it for csv now. Add guids to the list of things it can corrupt. (if the first group is numeric it parses as

Excel's braindead csv corruption is why I never use it for csv now. Add guids to the list of things it can corrupt. (if the first group is numeric it parses as an expression which then causes an error because the next group has hex digits, what!?) Also any long string that happens to only be digits. And two numbers separated by a "/". It's so bad I check any csv file I get if it's been opened in Excel, and if I find any evidence that it has I reject it and make whoever I got it from give me the original source, or transform it with literally any other tool.