It sucks that all this new rocket technology is being developed for weapons of war, but it's also really neat seeing how the technology is progressing. I used to think about solid rockets as the "more reliable and stable, you can turn them in, but not off" type while liquid rockets were "less reliable, but you can turn them off and on repeatedly," so it's cool to see how that paradigm has shifted through the years.
One of my favorite things is seeing scientists say "it's not possible to do this" while others say "no, we just don't know how to do it yet." I always try to be the second type unless physics is working against me.