Tankietoopera1907, Yeah for sure, I think it'd be more convenient a switch to turn this feature on/off, so if it's on and there are more than 2 tabs, it should warn you that you are trying to close Opera.

Yeah, the feature would be totally optional, so by default it'd be desactivated so it will not put in your way if you don't want it. The thing is, I don't get why you can't see the pure essential of this simply feature; if you have time, I invite you to open 30+ tabs, begin various downloads with large size depending of your speed, write a big status on facebook, or upload a big file. Then, in the middle of these stuff, hit the "X" button and close Opera, then you might think "well, I don't get his point, I closed it because I wanted", well that might be true, but the thing is that if you didn't actually wanted to close Opera, and you hit the "X" button accidentaly you lose irrecoverable stuff like those I listed before. How this can happen? I wanted to "restore down" or "resize", oops "x" button, Computer got slow, hit "x" of a crashed software many times, one goes for the software and other for Opera, Opera closed. And other cases.

Exactly what the title says; including an option to let the user choose where should be saved the folder "/Opera Software/Opera Stable" that holds all the data (history, the bookmarks, the extensions (and their configs), cookies, etc) that it's located in \AppData\Roaming\ by default. This came to my mind when the past week I lose all this data because the OS decided to die without prior notice and taking with it the possibilities I had to make a back up. So if there is an option to choose a different location to save the data than the default System Drive, this time I might not lose all the precious data.

A simple dialog that appears everytime you are going to close Opera when having multiple tabs.
The lacking of this feature is desperating, why developers deleted this feature? It's maddening when I accidentally hit the "X" and lose uncompleted downloads, unsaved text in forums, blogs, etc., buffered videos, and having to open and reload the many (21) tabs I had.