I have seen many people in this community either talking about switching to Brave, or people who are actively using Brave. I would like to remind people that Brave browser (and by extension their search engine) is not privacy-centric whatsoever.
Brave was already ousted as spyware in the past and the company has made many decisions that are questionable at best. For example, Brave made a cryptocurrency which they then added to a rewards program that is built into the browser to encourage you to enable ads that are controlled by Brave.
After creating this cryptocurrency and rewards program, they started inserting affiliate codes into URL's. Prior to this they had faked fundraising for popular social media creators.
Do these decisions seem like ones a company that cares about their users (and by extension their privacy) would make? I'd say the answer is a very clear no.
One last thing, Brave illegally promoted an eToro affiliate program making a fortune from its users who will likely lose their money.
Proprietary, yes, from a Foss pov it's not good I guess
Owned by ex opera ppl: that's a good thing tbh. Old opera was fantastic. New opera is more fishy after they were acquired by a Chinese group.
There is a lot of browser love in Vivaldi tbh. They are very open and transparent. Haven't found a single red flag about Vivaldi (aside from not being FOSS, which for me isn't a red flag per se)
They even run their own Mastodon servers for their community ;)
Proprietary software is generally frowned upon in this community, however I personally don't mind that much.