I've switched to Brave about a couple of weeks ago and really can't tell any difference in daily use. Maybe Brave feels a little leaner because I don't have all those extensions installed.
The only issues I've had, and it's because of my stricter security settings, is some sites won't display correctly or will lock up. Fox Business and twitchy are examples. For that I have just been opening them in Edge, and for other sites, I guess I simply don't care as much about the internet as I did, because if I can't see them correctly, I just move on. I might replace Edge with Waterfox as the "backup browser", though surprisingly, MS has not been nearly as SJW as the other tech giants.
Mozilla absolutely disappointed me more than any of the others. I guess I always expected the totalitarianism stuff from the likes of Google, but I've used Mozilla since the Netscape days, and more than any of the others, they always made a big show of how they were about internet freedom. They are turning into the worst of the bunch.