I’ve never had any issue and have used CSV for years from hundreds of sources. I prefer the “what you see is what you get” and not Excel’s “helpful” guessing at dates.

Excel can’t even get it’s own shit right when it’s in XLSX:

https://www.theverge.com/2020/8/6/21355674/human-genes-rename-microsoft-excel-misreading-dates

Or you know, use a non-proprietary format like CSV and analyze your data in any language you damn well please.