It's honestly way too huge to summarize in any meaningful way, but here are the absolute biggest changes, and you'll just have to dig into the changelog or the game itself for more detail. This release is made up of 37,604 commits authored by over 700 contributors, and it roughly doubled the number of everything in the game, items, monsters, map buildings, you name it, we doubled it. Future releases are planned for roughly 6-month intervals.
It's the longest-lived and largest in every way release we've ever done, and we hope to never do it again. More UI polish, more features, more content, more long-asked-for changes. The Danny release is characterized by MORE.