I remember building my gaming machine in 2008 and put 4GB (2x2) in, then RAM prices tanked 6 months later so I added another 4GB. I remember having lots of conversations where I was like "yeah, 8GB is over kill" but what I didn't expect is that it was such overkill that when I built my next machine in 2012, I still only put 8GB on it.
It wasn't until 2019 that I built a machine and put 16GB in it. I ran on 8GB for over a decade. Pretty impressive for gaming.