Maybe for the accountants! I have always done my own taxes, but used arcane custom spreadsheets that accumulated cruft each year. I told cowork to pretend it was an accountant and reorganize them using best practices, and the result is much better than what I had before. It also helped me complete a task I had been deferring for years (tracking down the history of money in my IRAs that had been transferred between different institutions, plus withdrawals conversions etc). Obviously I’m responsible for any errors Claude makes, but it seems to do a good job, and I don’t want to pay an accountant every year.