8GB RAM vs 16 GB RAM?

[Farsala]

McDonaldsGuy said:

Man I remember when 8GB of RAM was a huge deal.... back in 2003 (PowerMac G5).

I feel like we haven't advanced computers at all in the past 10 years. We should be at 512GB by now.

16GB is better, but the speed of the ram is just as important. IMO I'd go for 32GB of RAM.

What's a decent memory speed?