I see and hear that intro every time I start the browser. This is ridiculous. This so-called "feature" even more disturbing than "lucid mode" (this notification pop-ups every time as well) or "tab islands" (last one is quite handy though).
I couldn't disable it via flag #opera-one-introduction. It just gets enabled again when I choose "disable" and restart browser.
Updates in the last year or two are getting worse and worse, and though Opera has some crucial features for me like tabs organizing, but my plans are all about to use something else. After about a decade of using Opera, lol.