system
A chat on subreddit /r/pcmasterrace
human
C13 is actually rated for up to 15A, which you then derate to 12A for continuous loads.  I suspect that you're getting the 10A from the cord rating, which is the result of using thinner conductors that are not rated to handle 15A.  And to nitpick, a C20 is actually rated for up to 20A; 16A comes from needing to derate to 80% for continuous loads.
gpt
This is the correct answer. It’s overengineering to imply luxury, but it doesn’t actually add any value. Same with buying a 1,200 or 1,500 watt PSU- entirely unnecessary for most gaming rigs unless you’re running a 4090+12900k/13900k.