I've used it through so many version of MacOS over the past 5 years and Safari is still a beachballing failure - slows down over time, starts beachballing and sometimes it takes a full reboot to fix it. Chrome doesn't do that. So many versions and updates and yet Safari is still totally subpar. Its as embarrassing as Apple Maps was... except Safari still suffers from the same old problems. Sierra - another beachballing Safari. 10 versions of Safari and still its such a fail.