Linus is just wrong as far as maintenance, as a look at the linux-zfs lists would show.
From my perspective, it has no real competitor under linux, which is why I use it. I don't consider brtfs mature enough for critical data. (Others can reasonably disagree, I have intentionally high standards for data durability.)
Aside from legal issues, he's talking out of his ass.
Bitrot is a real thing and deduplication is actually very useful for many usecases, so your sarcasm is ill-advised. ZFS has legitimate useful features that ext4 does not.
From my perspective, it has no real competitor under linux, which is why I use it. I don't consider brtfs mature enough for critical data. (Others can reasonably disagree, I have intentionally high standards for data durability.)
Aside from legal issues, he's talking out of his ass.