Except for Vivaldi, ever since the Mv3 news came out they’ve always said they’re going to go around it. Here for instance one of the developers talks about there intentions going forward.

Vivaldi too is technically Opera 2.0 as it was created by Jon von Tetzchner who was the co-creator of Opera, and Opera (until the chinese consortium sale that is, after von Tetzchner had left the company) was always synonymous with privacy and innovation.

So even though Vivaldi is a fork of Chromium I believe from everything I’ve read about the guy, Jon von Tetzchner is 100% commited to his principals. Like one of my favourite von Tetzchner stories is from when Opera 8 came out and he said if it got to a million downloads over a weekend he’d swim the Atlantic, so when Opera 8 smashed the million downloads instead of trying to welch out on the bet he followed through, didn’t make it very far but he still did it and I feel that says a lot about his character. Here’s the best article I could find about it as it was back in '05 and Opera seems to have nuked it’s old news articles.