I found RefinedVanilla and it is a true vanilla anarchy server with basically no rules except no hacked clients. You can build destroy explore and just do whatever you want in a world that stays close to how Mojang intended.
It runs on Fabric instead of Paper or Folia so stuff like redstone TNT pistons and tick timing act like single player. That makes it feel right for technical players who care about real vanilla behavior.
They also have a custom Fabric fork with multithreading to help it handle higher player counts. The server can change simulation distance mobcaps and render distance to keep it running smooth.
Nether roof is enabled. Chunk trailing is patched. Portal chunkloaders can work but they unload when there are no nearby players in either dimension.
True Vanilla Anarchy Done Right

Miner Metro: Where questing is just a pipe dream! Come get enchanted with towny and pyro plugins, all while dodging those pesky creepers

Miner Metro Minecraft Server
Overview:
Miner Metro is a Minecraft server with years of experience, featuring tons of quests and custom features like Pipes, Ore block elevators, Custom redstone mechanics, and more. Join our active community with weekly events and competitions!
Server Information:
Website https://minermetro.fun Server IP play.minermetro.fun Custom Features:
Feature Description Pipes An alternative to hoppers Ore block elevators Custom redstone mechanics for easier building and automation Chunk hoppers Custom crafting and furnace recipes FAQ:
Question Answer How do I join the server? Simply enter the server IP: play.minermetro.fun in your Minecraft client. Is there a Discord community? Yes, our community is active on Discord. Join us at https://discord.com/invite/H7FUHmr9Vf
