I will unabashedly say that the "Livejournal era" was my favorite era of the internet to date. You can still blog in 2019, obviously, on LJ or elsewhere. But your friends aren't going to read it. That's why LJ worked: it was both a blogging platform and an aggregated feed of your LJ friends' blog posts, and you all had a more or less equal ability to comment and respond to each other. Crucially, LJ had enough markets…
LJ also had a culture of longer, more introspective posts. Facebook encourages the light, picture-plus-a-quick comment post because they're easy to make. LJ was much more comfortable for deeper engagement.
(Where it would actually be read, and a sufficient number of my friends might do similar things)