[lordpipe]

> Might make sense if the region files are on a fast SSD and the server is more CPU-constrained?

I wrote that when the feature had just come out. Now it's been a bit since Minecraft started natively supporting the LZ4 chunk compression option. It seems safe to say that this tradeoff does in fact make sense, even when the CPU is quite powerful. Several servers have adopted it and have seen decent improvements.