[novariation]

I work a lot with F500 companies which have been around for decades, and that hurts because it's so true.

I hate XLSX with a passion. The main issue is that as a file format it's too heavy, slow, clunky, and does weird data type conversions, but that's not the only problem.

The main problem of excel is "mission creep". It just does too many things in a half-assed way. So when you get a bunch of excel files to process for your data analysis task, you can't be sure someone didn't put a bunch of charts, merged cells, used formulas, used strange currency or unit formatting gimmicks, structured the data in a weird way to make it visually appealing to management, and so on. It's all so tiresome.