I stopped working there right as it exploded, so I can't list them all, but I know a ton of backend work was done after I left to make site more stable and faster.
And externally the biggest one was mobile support, which is light years ahead of what it was back then.
Light years ahead with a subset of the features. Reddit has been down for me a lot lately too. I'm not sure Reddit has been getting better tbh. As long as the communities stick around I'll keep using it though. I like reddit a lot.
And externally the biggest one was mobile support, which is light years ahead of what it was back then.