I found Xapros SMP and it is a chill vanilla survival server for adults only. The community is 18 plus and it has players from lots of time zones so you can usually find someone online.
This server is meant for long term play and it started in January 2025 with no plans to reset. It is good if you want to do a big megabuild and keep it forever.
It stays close to normal Minecraft because it runs on Fabric instead of Spigot or Paper so redstone and farms act like singleplayer. The server also has BlazeandCave advancements for extra goals.
There are no land claims but griefing and stealing are not allowed and there is a way to inspect logs if something goes missing. You can shop at spawn using diamonds and travel fast with Nether ice boat highways. There is also a world map you can view and there are no world borders so you can live very far away if you want.
