Folia VS Purpur

https://www.2b2t.org/mods/ on the page click the link to find out more and it takes you here https://github.com/PaperMC/Folia

Thanks to https://github.com/PaperMC/Folia you could even use more than one core

I'm planning on preordering the Pioneer as soon as it's available for a couple reasons even though it's going to be at least $1500 for the board alone. That's because there is a new Minecraft server software called Folia which is extremely multithreaded, which is a revolutionary new thing in the Minecraft server world. Unfortunately, to take advantage of it, your processor needs at least 16 cores (not threads), which most desktop CPUs don't qualify for as well as many server VMs. Fortunately, the Pioneer has a full 64 of them, which is basically unequaled elsewhere with the only viable competition being Threadrippers at datacenters. The other reason I'm preordering it is because 64 cores might be good for processing bulk data which my internship is going to have a lot of.

They’ve also said it in the official Paper discord, and it’s stated on the Folia GitHub repository. https://github.com/PaperMC/Folia

An open source version of this already exists.

there is REGION_LOGIC.md on folia's github

But it is available in source code form here: https://github.com/PaperMC/Folia/

We will be downloading the Minecraft server files into this directory. To preface, there are numerous variations of server JARs that can be used (e.g. Spigot, Paper, Purpur each touting their own benefits). For this tutorial, we will be working with Paper, a fork of Spigot that is optimized for performance.

I Mostly Like Linux as a OS For a Server and PurpurMC (https://purpurmc.org) As a Server Software and i Mostly Use EssentialsX and WorldEdit and More Server Management Stuff.

If you prefer to go the old-school Bukkit/Spigot/Paper/Purpur route (which provides the greatest level of compatibility with pre-existing server plugins), I recommend the latter of the four. Each of these projects is a fork, built on each other in that same order. Each fork offers additional customisation, API, and performance enhancements over its predecessor.

I’d recommend Paper (which is a fork of spigot) or Purpur which is a fork of paper and pufferfish

If you're looking to re-add gravity duping I would recommend not using a plugin but switching your server software to PurpurMC. It is a fork/version of PaperMC that re-adds gravity duping as a config option as well as the ability to toggle back on things like tnt duping and several other features that the PaperMC devs arbitrarily decided were bugs (even though Mojang has explicitly not removed them).

Small addendum:\ If you want to keep using a paper derivative (as a drop-in replacement), you can use purpurMC instead. It provides a config option to enable gravity block duping by disabling sand.fix-duping. (At least for sand)

You can host a small purpur server

Have you tried re-downloading the latest purpur jar file from the purpur website?

tweak some configuration, try lower your entities spawn, I at last you might want to try PurPurMC for the server, it's paper fork with some modification, I feel a lot of improvement since using this fork...