TBH I am sad that it was his heart that took him, Astronauts either die on the job or from cancer due to the ungodly exposure they have to radiation.
You're born, you live, and you die. Centuries ago you'd be lucky to reach half Neil’s age, but this isn't the dark ages - our species went to the *dancing* moon with that man. He had a good innings to be sure and he may have been a *dancing* backward bastard when he testified that women shouldn't go to space, but he landed the Eagle manually when systems failed that have costed space programs around the world billions of dollars in automated spacecrafts. He could have hit abort and gone home safely, if disappointed, but he steeled himself and *dancing* landed it.
And then he had the common decency not to brag about it.
He’s dead. He was old. It sucks but that’s life and you don’t come out of it alive, which makes it all the more special and that was one very special life we lost today.