Comment by wolfgke

Being German, I think rather differently (probably this is a different culture; US citizens might think differently) about this. Consider

    Sortix is a small self-hosting Unix-like operating system developed since 2011 aiming 
    to be a clean and modern POSIX implementation.

vs.

    Sortix is a clean and modern POSIX implementation.

If it isn't yet a clean POSIX implementation, the second one is a blatant lie to a potential user (which they will and should not forgive). On the other hand, the first one is quite honest in that is clearly tells what is there and the clear commitment to reach a clean and modern POSIX implementation - sounds fair and honest.