I know this has been discussed earlier in general, but couldn’t find this specific detail mentioned, so: why not allow pairing Sub with Move with the limitation, that Move needs to be in it’s charging base. Idea here is obviously that the charging base would be in static location, and if you lift the Move from it’s charging base, it would automatically disconnect the Sub. And when placing back, it would automatically reconnect to Sub.
This is the kind of smart audio I’d expect from Sonos.