They actually re-use the SAME comment section/discussion, but that Topic keeps on getting updated periodically. So that's why you can see OLD comments from 2020 as well, but the article has been updated/amended.
I have observed this same trend in other similar threads, like those related to BEST GPUs/CPUs, AMD Vs Nvidia, Top ten BEST <enter name here> etc and etc. Other News articles don't have this though.
As new CPUs, GPUs keep releasing, the original article is edited to reflect the changes, but they re-use the SAME comment section as before. This is how these similar articles work out here though, , because my guess is that these Topics are just the same IMO. Only the content needs an update, whenever a NEW Hardware is out.