just skipped around through some of the CPU-limited sections since I imagine that's the only part that matters.
Yeah, pretty much, I included both for the sake of it.
In any case, it seems like there's not much to gain from using NTSYNC yet; maybe improvements will be made to at least tie FSYNC. My rudimentary (possibly incorrect) understanding is that FSYNC is hacky and that NTSYNC is the "correct" way to do it, so if nothing else getting NTSYNC to tie FSYNC means FSYNC can be deprecated at least.
It might be better in the future, but it's not there yet, the implementation is not even finished to be fair.
Brasil, the name comes from Pau Brasil, a tree that has a deep red color, used to make dye and for its quite beautiful red wood. The word Brasil comes from brasa (ember), essentially means "tree that's red like an ember".
Fsync hasn't been dropped from the kernel, 6.15 still supports it, this test was done on 6.15.