[qxnqd]

That is opt-in.

Edge hasn't been released yet.

Vivaldi UI is a buggy and slow mess (I invite you to try it yourself)

[frosted-flakes]

Edge-ium is about to be released. It's very stable. I've been using the preview for months.

[garraeth]

I use Vivaldi alongside Chrome for dev, and from that perspective (for the other devs here on HN) they seem like clones of each other. Both running the same JS engine and dev tools.