Since the browsers remember zoom level I just set it to be comfortable for whatever it is and forget all about it, I had to check what I have HN set to on my desktop and it's 190%.
It's not that I can't read it at 100 it's just tiring and I have mild astigmatism so I get eye strain.
The HN default of tiny text is headache inducing. I have pretty good vision, but HN is one of the few sites where I have to crank it up to 150% zoom minimum.
It's weird, I think HN's text size is perfect and view the site at 100%. I clicked through to your link and immediately scaled it down to 66% to make it readable.
It's not that I can't read it at 100 it's just tiring and I have mild astigmatism so I get eye strain.