LOL, it used to quit immediately without asking but if I recall correctly some people asked for Exit confirmation then it was implemented.
I see that you created a topic asking for an option to be implemented so I'm closing this one as a duplicate of https://forums.opera.com/topic/11303/really-quit
Yes, I noticed this....it's what you look for to catch malicious apps.
A 'User Report' ..., when they've just had all your clicks & links & have all your bookmarks anyway...
And the User pays for it on their data plan. The app size, data growth, cache & background data is higher than even Google or Facebook....Lol.