Aside from the usual "because everyone has different preferences and more people prefer it this way," a lot of what happens on social media is ephemeral, and to

Aside from the usual "because everyone has different preferences and more people prefer it this way," a lot of what happens on social media is ephemeral, and to many people there is little value to go back and see things that happened a while ago versus something happening right now with higher engagement. It's the difference of seeing what happened versus wanting to be part of it.