Samsung has steadily been improving its software update speed over the last few years. Security patches are already impeccable, but major Android updates are still two or three months behind Google. In June, there was a rumor that Samsung would be releasing One UI 4 based on Android 12 earlier than in recent years. That seems to be the case, as one of the community managers accidentally announced the beta early before swiftly deleting the post.
Samsung has continued to improve its update speed every year since One UI first debuted, and the way it rapidly releases security patches each month is the standard by which all other (non-Google) Android manufacturers are judged. There's still room for more improvement, though, like with the way the S20 had to wait until December 2020 for its Android 11 update. According to some recent rumors, Samsung might be gearing up to release the next big Android version faster than ever.