What the hell happened.
I was using Opera for the last 10 years. And to me it was by far the best browser. I decided to switch from version 12 to this new version. All the staff I used to love is gone. Where are that panels on the left (F4).
I used to use notes a lot, and now in there help all they say is

During your upgrade, Opera 15 condensed your notes into an .html file, and saved them to your computer. Look for a file called Opera 12 Notes.html on your computer's desktop.

What am I supposed to do with html file on the desktop. To me It's useless like that.

Same can be said about bookmarks system. RSS is gone too.
Why did they do this?