That's wild, I had no idea. I have trouble imagining a case where it's worth spending 30 years coming to a conclusion, but I guess that's one many reasons I'm not a corporate tax lawyer!

One such repeating case ended up settling for over $10B, so it was definitely worth it!

To clarify, they spent decades litigating the same fundamental issue for each year’s tax filings, with each filing year taking multiple years to get to court. The plaintiffs won every single case until the government finally settled all the remaining tax years for that amount. Each year prior was worth hundreds of millions.