It took me until today to realize that Tumblr's threading is the opposite of Reddit's.
I guess that's what happens, though, when you haven't really updated your format in 20 years and have always had the reputation of being the social media site for people who hate social media.
Props to the original CEO, though, for making a site that did exactly what he wanted: not be Facebook in any way, and allow him to post photos that people who followed him could see and allow him to follow people so he could see photos that they posted. Mission accomplished on that end.
You got me on that one, no clue. All I know is that Twitter is where basically all the crazies from Tumblr went after the "female presenting nipples" porn ban.
I suppose some programs might have done that? The way it starts with the oldest center-right and more narrow is unusual, plus the names of the authors being separated by long distances from what they wrote. I’m more familiar with a hierarchy that starts with the oldest on top left and narrows and expands towards the right, like essentially every web forum does.