Okay things like copy paste and formatting would be nice, but many websites block this anyway.
I deal with financial statements from many companies and pdf's are way, way better. I roughly know where the data I'm looking for is based on the length of the document.
Many businesses have fancy web financials and they're terrible even when implemented well. I don't want to have to scroll around looking for where the content menu is, then figure out which ambiguous heading they've placed a submenu to the data I'm looking for. Pdf's I can just scroll, no surprises on the direction of the document or obscure placement of links.