We’ve been testing pushing early updates to a small group of opt-in users for update9 and the connectivity hotfix. This went well so we’re going one step further and making each software update available for opt in approximately one week before releasing it. We mainly expect this to be useful for developers and technically minded users who can handle potential problems (eg if you don’t know how to do a backup and a restore then it may not be for you).
Flip a toggle on your Jolla account settings page and you’ll receive each new Sailfish update a week before general release so you can test it out. Needless to say, my switch has been flipped.