My parents have 8GB and 16GB, respectively. The computer with 8GB is 6 years old and it was the base model at the time.

$450 in 2015 would have bought you a Dell laptop with 6GB of upgradable memory:

https://www.laptopmag.com/reviews/laptops/dell-inspiron-15-5...

My uncle bought a $350 trash Windows PC a couple years ago, literally the cheapest thing I could find on sale at Staples, and it came with 12GB of RAM.