It's good because it's lessening the "hardship" of leaving reddit. Imagine leaving reddit and there's literally no alternatives out there that match that format. Imagine if it was just Reddit, Twitter, Facebook, Instagram, Tiktok, Youtube, and whatever else, but nothing else that matched that sort of long stream of post headlines that Reddit has done so well. The others kind of do a similarish thing (post streams), BUT me personally I like this condensed headline format, I don't want to see a ginormous posts that takes up half the page and I have to waste valuable microseconds scrolling past it to get to the next giant post.
I'm an info addict and I want to see twenty posts on a page, briefly scan through them and keep scrolling down, just droves and droves of headlines that I can react to and completely skip past reading the article and go straight into commenting on it like I'm an expert on this thing I didn't even know about 5 minutes ago.