Show me a product from 10 years ago that is still around, and popular, in essentially the same form.
Microsoft Office 2003. Now, to be fair, this does indeed depend on how you count. Office 2003 is still feature complete for most Office users. Office 2007/2010/2013 has a fresh coat of paint, and Sparklines are nice and all, but functionally speaking, it may fit your criteria. Alternatively, we can point to the fact that most Office clones (Open/LibreOffice, AbiWord, iWork) have a very similar layout and functionality.
But, let's assume that we're talking about current iterations. eBay and Paypal are still very recognizable from 2005. Amazon still sells books. The iTunes Music Store hasn't changed much. My ISP still offers Usenet access, and Yahoo mail is still quite popular; hell "e-mail" is quite possibly the longest lived digital communication protocol ever created. Google's search page hasn't changed significantly in ten years.
Now, to be fair to your point, this is certainly a list of exceptions that took a bit of time to come up with. However, I'll also point out that the reason why Office 2003 was my primary example is that it's still possible for users to install it on a computer purchased today as long as they have their installation discs. Google discontinues products when they're no longer viable for Google, and that's their prerogative. However, I submit that if Google is going to devise a means of facilitating the generation of data, to which they have the exclusive means by which to make that data useful, that the onus should be on them to ensure that the users receive copies of that data if the service is to go down. Now yes, I understand that the users are the product, not the customers, but that then lends credence to the grandparent's point. Office 2003 may long be discontinued, but Microsoft didn't take my data with them when Office 2007 was released. Google's "everything on Google's servers" philosophy has its merit, but its caveats are clear as well. I have AIM conversations from 1999 that are still stored as HTML files. I cannot say the same for discussions in Google Wave.