It makes sense; some friends and I were discussing this possibility a few days ago, then the new clash was made public and we were curious as to why Linus kept tolerating this behavior (my speculation is that he really wants a competent competitor to ZFS in the mainline kernel, and was willing to tolerate more disagreement than usual).

I think Linus made the right decision here; BCacheFS is a very interesting experiment, but kernel devs need to work together, not against each other. There is enough turmoil with the Rust situation, the kernel does not need any more.