After reading this link: I'm wondering why openSuse is switching from ext4 to Btrfs.

Performance looks worse than ext4. Ext4 is in use on lots of computers, so most bugs have been fixed. Why is openSuse setting the default fs to Btrfs and risk the data of their users by new bugs? At least they should warn their users...

For sure I'll stick with ext4 for the nearby future and let other people risk their data and file the bugreports.

Best Regards.