>>346319481
Yes a better CPU will run the game better, but you aren't getting 90fps in a crowed world no matter what hardware you buy and that's what I would consider "being able to run the game". I was more trying to emphasize how it is almost guaranteed to be limited by a single thread on you CPU rather than RAM.
>>346320053
>is it only using one of those 4 cores
Essentially yes. You can see your individual thread usage in task manager. If you look at that while you are in a busy VRC lobby you'll see the % usage isn't 100% but one of the threads will be almost maxed out. This is typical for most Unity games.