The code is not better than an imaginary human paid to work on this as long as they wanted. But said human and sponsor did not seem to exist.

If not for LLMs this type of hardening would not be possible for me to justify at a startup, and I would have had to sigh and accept the huge attack surface of systemd.

I am a security engineer and there are unlimited things to harden, so LLMs let us harden a lot more in the same very limited time.