I like to think that it's one of the few factors that really unite the whole HN community - most of us lurkers here have gone through or will go through a tech

I like to think that it's one of the few factors that really unite the whole HN community - most of us lurkers here have gone through or will go through a tech interview at some point. So it's universally educational for the HN audience and it's not a polarizing topic. It's also kind of like somebody posting true life pro tips because it's useful for most of us hence why it gathers so mony upvotes probably.