[adamwiggins]

In that case you'd still have full access to your documents.

In keeping with local-first values the complete and canonical dataset resides on your devices (Macs/iPads). Sync service outage or total shutdown would result in your no longer being able to sync between devices, but all the devices would have whatever data they had at time the service went offline, and you can continue to make local edits until the end of time.

You can test this out: just put some stuff into Muse, then turn off your wifi / go into airplane mode / shut off the network in some other way. Keep working with your data and watch the sync indicator; it will show that you have a lot of unsynced changes, but never will your ability to work be interrupted.

[CGamesPlay]

And, just to confirm, there's nothing that would cause you to get logged out and pushed into some login screen, is there? Spotify had a nasty bug where it locked you out of all of your offline content because their server accidentally responded with a 401 when it had an outage.

Thanks for the replies. I actually did try out Muse after reading them!