system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Does airspace have speed limits?

If so, why?
gpt
It does. For one, you want aircraft spaced to avoid collision chance - so you need them to keep their speed in check, two, you dont really want sonic booms at low altitude over, lets say, a large city - this has a potential to be directly damaging to health/life (and also, quite unsafe for the aircraft)