Since I know spigot as a way to improve performance for servers, I feel like there really should be a way to slow down lava/water flow. I see you can limit mob spawning, chunks, and many other things. Players can place a ton of lava down at sky limit, and it easily destroys the server tps, and possibly crashes it. I see many servers just resorting to disabling lava flow, but many also slow it down. Since this is a mechanic to improving performance in the server, I feel like spigot should think about adding this. I've done a ton of research, and not one plugin does this. Again, this seems sort of simple to do (I don't make plugins), and it would fit in with other aspects of spigot. I also know this has been asked for previously, but a developer shot it down cause they didn't think it aaffected performance. Well let me just say, I'm afraid to open my server with lava flow on, cause I know for a fact people will use lava to destroy the tps/crash the server. Please just think about it, cause I really feel like this is something spigot should include.