Comment by rleigh

Given that the kernel is nearly 30 years old, do you not find it slightly incredible that there has been no effort to stabilise the internal ABI while every other major kernel has managed it, including FreeBSD?

There are ways and means to do this. It would be perfectly possible to have a versioned VFS interface and permit filesystems to provide multiple implementations to interoperate with different kernel versions.

I can understand the desire to be unconstrained by legacy technical debt and be able to change code at will. I would find that liberating. However, this is no longer a project run by dedicated amateurs. It made it to the top, and at this point in time, it seems undisciplined and anachronistic.