>The amount of issues I have seen in the last ~20 years caused by "off by one" type of errors in Excel is insane. Generally those aren't a fault of excel, but

>The amount of issues I have seen in the last ~20 years caused by "off by one" type of errors in Excel is insane. Generally those aren't a fault of excel, but a fault of someone doing something dumb in excel. People do dumb stuff in every problem and it's nearly impossible to prevent it.