The fact that Firefox isn’t listed as a browser alternative but Brave is throws any credibility that this article might have straight into the garbage.
Suggesting Brave anything throws its credibility into the shitter, much less multiple times in multiple categories.
They really don’t, though. Inclusion/exclusion operators work most of the time, but it’ll still return results with explicitly-excluded keywords. It also fucks up results by returning entries with similar words to your query, even when you double-quote a part of the search term. Advanced queries that use booleans and logical AND/OR don’t work at all anymore, that functionality has been completely removed. It returns what it thinks you want, not what you actually want, even when explicitly crafting a query to be as specific as possible.
I use Kagi for search now and it’s 1000x better, especially when researching technical issues; it’s like when Google actually respected your search terms and query as a whole.