It's the niche stuff that made Reddit useful. For example, Amazon reviews are no longer trustworthy, but there were really good recommendations in reddit threads about which devices or products worked. The DIY subreddits were incredibly helpful. I got good recommendations for motorcycle tires and ultralight backpacking gear and Android apps and hotels in particular destinations from reddit. I got walkthroughs on how to set up a Plex server or do a particular project with a Raspberry Pi on reddit. With so many subs, there was almost always a thread for what I was looking for. That was the value. I expect it will take a while to rebuild that elsewhere, but I'm sure it will be recreated.