Actually, I am quite hopeful.
Of the three major projects using BFS as the basis of their file systems, Haiku is the only one left standing.
SkyOS is now only a memory in the Wayback Mahine...... Its last release alpha/beta release was in 2009.
Syllable OS (forked from orphaned AtheOS) went of the web at some point during 2017. Its last alpha release was in 2012.
Yes, the last formal Haiku release is now dated. However, improvements are still being made and the numbers of issues standing in the way of a formal beta release keeps decreasing. In the mean-time, the nightly builds, even if regressions are encountered once in a while, keeps getting better and better.