I don’t think you’ve read this yet, but you can sign up for many instances at once so if lemmy.world is down, you can go to the other instance immediately by either going to your alternate instance’s home page, or having an app like liftoff where it lets you switch immediately in your profile. Liftoff is open source and free as well. That way, you don’t have to leave Lemmy.world, just have a backup if it’s down. I highly suggest this route, I have 4 backup instances, some with the same name but I like world the best since it seems the most like reddit.