Debian is going to look as ridiculous for doing this as Alma Linux is for insisting btrfs isn’t an “enterprise file system” due to it lacking RAID 5/6.
AlmaLinux has made no such statement, for what it's worth.
Red Hat Enterprise Linux excludes btrfs support in its distribution because Red Hat does not believe btrfs to be stable enough to be worth considering. That decision trickles down to recompilation projects that pretty much amount to "RHEL, but without having to pay for it".
And rightfully so, imo. btrfs is the only filesystem I've used where it's gotten so corrupted due to faulty memory on a computer that I had to recover the files and reinstall from scratch after replacing the memory (obviously not using btrfs the second time ..).
Thanks for that correction. I misunderstood a forum post that was probably someone being snarky/cynical.
btrfs lacking RAID 5/6 is exactly the sort of thing that makes it get written off as a toy. ZFS has had working raidz[12] since 2005, raidz3 since 2007, and draid since 2021. Completely stable and enterprise-ready.