I'm on a fairly new machine (i9-9900K OC'd to 5.1 GHz, 32GB RAM, NVMe, RTX 2080 Super), and I was expecting smooth, stable frame rates at 1080p. Unfortunately, the game seems to be limited by one or two CPU threads consuming a constant 90-100% of those cores, while the other cores hover around 10-25%. As a result, I get fairly decent frame rates (25-50fps, depending on the area), but even in the best cases, it has a really annoying "micro stutter" that randomly - yet consistently - interrupts what would otherwise be an amazing experience.

I'm hopeful that an update could improve performance, especially with respect to spreading CPU load over more cores, but it sounds like a lot of other simmers are mostly content, so maybe that will never happen.