This is a rather old form and in its early days btrfs was not very stable.

People don’t know how CoW FSes work 🤷.

My only gripe with btrfs is that I’ve had systems come down from a single drive failure in raid quite “often” when compared to other FS.

ZFS is a ram hog but I always could do a live resilvering without downtime.

I don’t think I’d call it anything wrong, but the subvolumes definitely do make it different for installation purposes so that following ext4 instructions for bootloader configs or kernel arguments could put you on the wrong path

Nothing these days

performance

opening programs was noticeably slower for me

benchmarks confirm this, and I think this is an aspect not discussed often enough