This is the task manager on my dedicated server. Nothing but the server and a few chrome tabs are running. 16 cores, 32 threads all working hard. I'm testing a modpack I made with 200ish mods, but the big mods that are using all this horsepower are C2ME and Distant Horizons. I captured this while flying with an elytra full speed loading new chunks in a brand new world.
I never thought that I could use up most of a 7950X running one Minecraft server. When I was looking at hardware needed to run a Minecraft server most people recommended a lower tier CPU like 4 or 6 cores. 8 Cores even seems overkill to most people to recommend for a server.
Here's your proof that you might want really good CPU depending on what you're trying to do. Even a 7950X might struggle if you had more more than one person flying around.
EDIT: Yes I know, Windows bad Linux good. I get it. I followed your advice 18 months ago for my first server and ran Linux. I had to learn a new OS that I've never used before, my drivers only worked half the time, and I couldn't get a display output almost every time I came back to it after a day or two. I hated it so much that when I decided to make a new server I went with windows.