[2022] whats most important pc piece for rust

16 GB or more of RAM
CPU with good single thread performance
OS+Rust on an SSD

Originally posted by Pike1263: Two of my friends disabled it, now their game/server loads faster and they seem to have less issues than previously.

Did they measure it? There should be very little impact to single thread performance, if there is any at all. It's more likely placebo or some other changes they made, or they have a CPU with like 1 core/2 threads (which is going to suck no matter what).

Your OS is smart enough to schedule things on separate physical cores so it only uses the hyperthreaded cores if you need a boost in multithreading. I wouldn't disable hyperthreading unless you actually want to benchmark everything properly to make sure it is worth it.