So again, what self-destruction are you referring to?
In other words: They're very busy alienating massive parts of their user base.
Most Opera users are on mobile, not desktop. Opera is struggling on desktop. Sites weren't working, and that was the #1 problem with the browser. Fixing that will let them grow. Opera's got nothing to lose on the desktop. They can only gain users by doing this, even if a handful of hardcore users drop them.
Most people don't need most features in Opera 12, but they're just getting started with the new Opera. Now they can create a proper foundation instead of this:
http://www.favbrowser.com/opera-the-past-the-present-the-fut...
Opera 15 is not a fork of Chrome either. It's using Chrome (Chromium) as-is, but with a new user interface on top of it.
In other words: They may alienate a small hardcore group, but fixing site compatibility will more than make up for it because other people can finally start using it.
> Opera 15 is not a fork of Chrome either.
Are you thenwhat? Just on the off-chance that you're not him: What you described is exactly what a fork is. Please don't try to comment on software development until you've actually gained the experience that job entails.
Thenwhat? Huh? A fork is taking the code in a new direction and making it differ from the original. Using the code as-is, is not a fork.