I found a long running anarchy server that is all about surviving the chaos and still building stuff anyway. They talk about a big event that kicked off their so called 5th age after spawn got wrecked so badly that fixing it stopped being possible.
There are two server options that split from the same world. One is no hacking and it runs on folia and canvas. The other one allows hacking and runs on fabric.
The vibe is basically ride the mess like a rollercoaster and celebrate the history. If you like ruined spawn areas and server lore and watching how the same world can turn out different this place is for that.