On that note about running out of space, an interesting thing you have to keep in mind with btrfs is that, as a snapshotting filesystem you can't simply unlink

On that note about running out of space, an interesting thing you have to keep in mind with btrfs is that, as a snapshotting filesystem you can't simply unlink files to free up space. They're still present and taking up space in a previous snapshot. There's ways to free up space for real but you have to manually use some tools to do it from what I understand.