Game consoles are weird though, they have less RAM than contemporary PCs. Like PS3 and Xbox360 both had 512MB, while my iMac G5 had 1GB. Maybe cause the console's RAM is unified with the GPU, while the G5 only had 64-128MB VRAM.
Even before RAM got very expensive recently, it had already plateaued. Like 32 GB was still considered a lot for a PC and was about the same price as a decade prior.
For reference 4 GB is 8x more than a ps3.