I think one of the biggest problems with the internet is continuity. Your online experience is continuous, there's no break, no stopping point, no logical partition. For everyone, with every platform you use, the presence you have on it grows and with that growth, the weight of what you contribute to that platform is carried with you.
Memories in real life fade for a reason, we hold on to what is important and we let go of the things that no longer serve us but the internet doesn't let you do that unless you go out of your way to make the conscious decision to "reset" your online presence but as a creator or as someone with a reputation that's pretty much impossible to do.