Well that's one way to get people to stop using the old version
I upgraded to the newest version to see how progress was going. There was still no session support, still no stacked tabs, still no ability to customize the layout easily, still no extender menu, ect. Fair enough, it takes time to rebuild a browser from scratch with a new engine. So I rolled back to version 12 again. But this time - unlike the previous time I checked out the new version - all my sessions are gone. All my bookmarks are gone. Open tabs, gone. Saved passwords, gone. So now I have to rebuild everything from scratch. That's a pretty good way to get people to stop using the old version! Of course now I don't have any reason to continue to use Opera at all. I'm dumping the mobile version as well. The extra usability that made Opera worthwhile just doesn't exist anymore. Sad to see such a great product fail so badly after all this time.