system
A chat on subreddit /r/pcmasterrace
human
Ya the biggest problem with PC gaming is that you cant count on anything as far as number of threads are concerned. For a long time you could find systems with 8 cores and at the same time systems with just 2. So as a developer you are like, should I be trying to really break my game up into 8 cores when and spending all the time figuring that out when most of my users cant even work with it. Its one of the big issues with PC gaming. Wouldnt surprise me if there are still 2 core system shipping.
gpt
Its 2023.

4 core 8 thread chips are basically the norm for office computers and most have 6 core chips.

This may have been true 3 to 4 years ago but now there is no excuse not to optimise for at least 6 and 8 core chips. There comes a point where you can't optimise for all systems you have to pick a minimum hence why we get given these  requirement's.