Sure, it's backwards compatible in theory. In practice I haven't had any device that kept working reliably with zero issues through every Android update and eve

Sure, it's backwards compatible in theory. In practice I haven't had any device that kept working reliably with zero issues through every Android update and every phone upgrade. Including very important ones like Tesla's phone key. Even Pebble wasn't flawless at the very beginning, but it got good fast and hasn't stopped working since the company went under.