In the early days after Fedora made it available, I lost my root twice after a kernel panic and later after a hard power reset.
EDIT: in comparison, I've been using xfs for almost a decade now with numerous hard power offs and kernel panics. I've only ever lost select files that were open for write at the time of restart, and not the entire filesystem.
Never used btrfs but I see corruption reports in here everytime I read about it, and it's been in development for over a decade and this thing needs to be put to rest before it eats more people's data.
Hopefully bcachefs becomes feature parity and stability against zfs to provide a modern filesystem to wider Linux audience at last.
Funny to see we're still using ext4 as the default filesystem which is nothing fancy forever.
Because the Fedora community wanted to, basically. They're not obligated to go along with whatever Red Hat wants to do, although there is naturally some alignment there. Plus having a different default filesystem really isn't that big of a deal.
disclosure: I work for Red Hat.