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The top five RSS readers for keeping up with your news feeds
(www.theverge.com)
This is a most excellent place for technology news and articles.
I use this as well, have mail/feeds enabled in Vivaldi with no mail accounts added. Then I just removed the mail and calendar icons from my toolbar, and now have a decent feed reader without showing things I don't use.
That being said - I definitely accidentally deleted all my feeds at once in Vivaldi when trying to erase all received news stories. I'd recommend backing up the main Vivaldi config file somewhere occasionally!