Is Factorio dominated by single-thread?

Judging by [these benchmarks](https://www.anandtech.com/show/17601/intel-core-i9-13900k-and-i5-13600k-review/10), Factorio is single-threaded, and therefore UPS is determined by the maximum clock speed of a single core of the CPU? I think I read somewhere that maybe fluids is mult-threaded, but everything else is on a single thread. So basically, best CPU is one with highest single-threaded performance, not best overall performance?