I mean, to build on what @the_jade said about the atmosphere, a lot of it comes from the subtle layers in the audio. Like, you hear individual shouts or conversations panning around you, not just a wall of noise. Idk, maybe it's just me but when the crowd reactions have that slight delay and reverb, it mimics real space perfectly. From messing with sound setups for small events, positioning the mics to capture ambient chatter from different angles is crucial. That way, when you listen back, your brain picks up on those spatial cues without thinking about it. Honestly, without that depth, it just feels flat and artificial.