Online conversations are unique in the way that so many of them can take place at once, so your entire frame of mind can change by the second depending on who you're talking to and what about. Sometimes this creates shallower emotions during those exchanges, because it gets draining to become fully invested in multiple intense discussions.

Written discourse in general is also unique in the sense that the words hang in the air, existing at all times. So you can be thinking or feeling something strongly, write about it, and then hear others respond once you're no longer so engaged. But to them, the time hasn't passed. This can result in fixating on something you might not otherwise; the opposite of what happens with multiple conversations. Online exchanges can do one or the other.

Both in-person and written communication have an important place, and I can't say one is superior. It just interests me how they bring about such different interactions and thought processes.