Logged in here to see if the old trick with the flags worked. It doesn't, the browser autoupdated to 70 version and now I'm stuck without yet another Opera feature that was extremely useful.
But that's it. I'm moving on to Vivaldi and I'll make sure that every single one of my friends, to whom I recommended Opera, leave it as well.
I hope this will go down as the single most stupid design decision in Opera's history and it drives aways the hundreds of users like me, who still hung on for years.
People of this thread: this conversation is months old, which shows that Opera's developers really don't care about it, the old trick with the flags won't work anymore and you all should just choose a better browser. Vivaldi and Firefox seems to be great.
Remember to remove the browser from your devices and to delete your Opera account, that's the only way they'll take notice (spoiler, they wont and they don't care).