Completely agree. It is a sad indicator of the state of our Internet that so-called "experts" are only wondering. We've been hearing for years that you shouldn't re-use passwords, so the conclusion seems pretty inescapable if you have the slightest amount of logic.
That said, password managers. Yes, definitely use one, but not necessarily a commercial product. After all, for accessing your Internet web sites from home, a notepad (with actual paper, not the Microsoft product) is largely sufficient and not at all hackable from the Internet. And before some of you attack me about having to access your passwords from multiple locations, not all of Internet users are such power users. Most people use the Internet from their home computer and that's it.
A notepad is enough for that. Oh, and a sense of organization.