More importantly, "..." has (at least; I don't know the exact timing here) a couple decades of history behind it as an indication of "more stuff is going to pop

More importantly, "..." has (at least; I don't know the exact timing here) a couple decades of history behind it as an indication of "more stuff is going to pop up when you click this item"-- it was used to indicate that a menu item was going to open a dialog prompting for more information at least as far back as Windows 3.1 on the Windows side and System 7 on the Mac side. But, really, I don't care that much about what character we use as a menu button; I just wish we'd settle on one, for consistency's sake. And, when we do show a menu button, it shouldn't become a "kitchen sink" kind of menu (looking at you, Chrome)-- a menu button (without specific text or a more specific icon) should house global navigation and functionality, with more specific functionality placed in contextually appropriate locations within your app, where the user will actually find them.