I wrote the GNC firmware for a loitering munition and it's... complicated. I am both very proud of and saddened by it. I'm also realizing that it could be said to be the most "impactful" thing I've built.
Actually, I strongly disagree. Ideally, it would not be in the air in the first place. Failing that, once it's in the air, I personally prefer that it go to the intended target rather than just kind of wherever it ends up.