In addition to what has already been said, the last time i used btrfs in this manner the protocol had issues with some extended attributes which happened to man

In addition to what has already been said, the last time i used btrfs in this manner the protocol had issues with some extended attributes which happened to manifest in issues on binaries which lets them gain additional capabilities[0] for example. Most notably this made iputils ping[1] utility unusable after branching of a previously made snapshot for further usage. This appears not to be a too common thing in other distributions but in arch the ping utility uses CAP_NET_RAWIO capability in order to avoid the need to use setuid which appears to be more common elsewhere. None the less i think that is something one would want to know the consequences of as i am sure there are quite a few more binaries with extended capabilities set in the extended attributes of its file or use them in another manner like security labels for SELinux. I just rechecked if this is still the case and found this patch[2] but i am not sure this has already landed. [0] https://linux.die.net/man/7/capabilities https://linux.die.net/man/7/capabilities [1] https://linux.die.net/man/8/ping https://linux.die.net/man/8/ping [2] https://patchwork.kernel.org/patch/10388011/ https://patchwork.kernel.org/patch/10388011/