Despite my sibling post to yours I think it's a good point. This https://forums.freebsd.org/threads/no-aslr-upstreaming.54771... has some content that may be of historical interest as to the why the ASLR delays (I can't speak to W^X). Going forward ASLR may take no more than another boot time knob twiddle https://wiki.freebsd.org/ASLR to add to OP .