You're assuming the same set of people that are commenting are those that are upvoting this article.
Another hypothesis is that those are two largely disjoint populations on HN. With the smaller one displeased with the article and is likely to express that in comments. The other, larger one is pleased with the article and doesn't bother much with comments.
That doesn't make sense. Motherboard usually support a certain number of memory sticks. You probably have 2x1GB sticks, you can upgrade by replacing them rather than adding additional sticks.
You probably do still have a 32bit system so you're still capped at 4GB of useful memory. I'd still upgrade my system if I were you.
I agree with you, but 7GB for 100 tabs sounds likes something unusual happened.
I usually have around 200-350 tabs open (Yes, I'm hoarding, I'm aware of it). I usually terminate their processes and respawn them when I need them (their state is not lost) but IIRC, when I don't I get around 3GB for 200 Tabs
The difference is, I can put custom JS on my Github page and send you a link, when you open it you run code I authored.
Developer console is just me running code, and is also on any arbitrary domain on any site.
[1] http://en.wikipedia.org/wiki/False_dilemma