I saw you mentioned in another thread Minecraft performs better when the CPU has better single-threaded performance. I'm guessing, going forward into the future, you'd probably want to build machines with Zen 2 AMD Ryzen CPUs (or future Zen 3 Ryzens), like the Threadripper 3960X (which has a base clock of 3.8 GHz, 24 physical CPU cores, and costs ~$1200 — so $50 for each of those cores). Or, the AMD Ryzen 9 3950X, which is about $40 per core (when you get it on sale), and despite a lower nominal base clock actually performs better on single-threaded benchmarks (e.g. https://www.cpubenchmark.net/singleThread.html).