2/ Related: there is a proposal to discuss "trust and maintenance of [#Linux #kernel] file systems" on this years #LinuxKernel maintainer summit:
https://lore.kernel.org/all/ZO9NK0FchtYjOuIH@infradead.org/
"""we have a lot of on-disk file system drivers […] maintaining them is a burden, and there is a lot expectation on how they are maintained. […]
Part 2: unmaintained file systems
[…] The easiest way forward would be to remove everything that is not fully maintained, but that would remove a lot of useful features. […]"""