A friend of mine is running a Minecraft server for a streamer SMP. We were promised nine gigabytes of Ram, and we only got six. On top of this we had constant server crashes, slow chunk loading, and horrendous server lag the entire time it was up. That is just in the overworld, the nether was a mess when it came to lag. We ran three low impact mods. Fabric API, Origin Mod, and the Mob Origins addon. We had no problems with them, but it didn't matter because if we did so much as go too fast in the water, the entire server would crash. This was an easy thing to do because one of the abilities doubles your speed in water, and if you interact with a dolphin, god help you. Shockbyte is so much better, and I recommend anyone looking for a server to host to use that instead.