btrfs has a tendency to break, and if you’re unlucky it breaks hard.
Btrfs doesn’t like power cuts for example. They can quickly render your system unbootable.
While btrfs does feel kind of unstable at times, it offers snapshots which are worth a ton both to tinkerers and newbies.
For devices that absolutely must not randomly break, I’d choose ext4, in all other cases btrfs would suffice.
But as mentioned above, you can pretty much forget ext4 on garuda.