Because it's interesting and technical. Despite the name 'Hacker News', I don't know if you've noticed but not a lot of what's on here is necessarily news — just plenty of food for thought for engineers, people in comp sci, etc.
The linked article is a very indepth, clearly presented breakdown and analysis of the hardware. It's well written and educational. Works like this get hella karma on this site.
Sometimes, it's an important step in the path of hardware evolution; sometimes, it's a path not followed that we can learn from; either way, 20-year-old hardware is still relevant.