I found a small anarchy server that has been running on the same world for about 4 months and it is still going. It is the kind of place that does not do seasons and does not do wipes just to bring hype back.
It is mostly vanilla but it has TPA and vote homes only. Dupes are patched and most exploits are allowed but movement hacks and xray are not.
The world border is huge at 1m by 1m and the server is hosted in the EU on a dedicated machine. It usually sits around 20 TPS and there are like 0 to 9 players daily.
Spawn is not safe and people will lie to you so you can lose everything fast. If you stick it out you might actually build something that stays there.
This Anarchy Server Actually Stays Alive
GG.MINEWIND.NET New Server IPOne Life Semi Anarchy Hardcore Vanilla
This is a hardcore survival server that stays close to vanilla but adds a few tweaks for the hardcore vibe. You only get one life and when you die you are gone for good with no revivals.
The world will never reset so every base and every ruined spot stays as part of the story. The server feels semi anarchic so you can mostly do whatever you want but it also has some limits near spawn like stopping lava casting and blocking wither spawns to help keep the area from getting totally wrecked.
There are custom features that make the world feel more alive like stat leaderboards and player heads dropping on death. If you die there is also a way to pass your enderchest to someone which is kind of wild. You can also disable phantoms.
It runs on version 1.21.11 and it supports joining on 1.21 or newer and there is also a Bedrock port.GG.MINEWIND.NET New Server IP