One day we should do some stats about site going down on HN. That would make a nice narrative for why engineering matters and running a site on your own home server ain't real business.
Not everything needs to be real business... Solid infrastructure has an associated cost in both time and money that not everybody is willing to pay, especially for side-projects.
Not everything is costly. For instance a wordpress.com is free and takes unlimited traffic but your own wordpress instance costs money and has limited traffic.
As a person who has front paged multiple times on HN, I can tell you my blog is self hosted WordPress on a $10/mo digital ocean droplet, and it has fared very well every single time, including almost 100k views in a single day. I'm pretty sure if my $10 stock instance can handle the traffic, WordPress.com can definitely.
