One of the interesting features of BTRFS is the dynamic snapshot generation, which grantees the possibility to have a perfect and immediate copy of a specific path.
Sometimes containers log a lot of things, and the logfile can become huge. This happens because containers aren't supposed to run for a long time but to be created/disposed regularly. Here's how
I've been using BTRFS for years and I've had few problems. Some of them are small and can be avoided with some smart improvements.