Not an awful lot these days, but I used to write long, bureaucratic docs for a living, worked a lot with complex budgets and financial reports too.

Nothing beats native Word or Excel for this sort of work. Browser-based tools and open alternatives don't come close.

Fortunately, it's not my main line of work now and I can get away without. I'd still love to be able to use Word and Excel natively though.

I get documents from a variety of clients that use Office, and often get spreadsheets that have to work without any bugs or surprises. It also helps when I'm screensharing to use tools people are familiar with.

The final reason is that I hate having to redo my resume, which I made originally as a .docx that doesn't render well outside of Word. Even between Word versions it fucks up. I'm soft-locked in.