Counterpoint, blog posts age; information or opinion from 10 years ago may no longer be accurate or reflect the author's held beliefs. Is it still worth discussing it then?
That said, I run old fashioned forums and some older threads get revived there from time to time with new insights. Others get flagged up by copyright holders under DMCA takedown threats or bumped by spambots though.
I wanted to add that some zombie/necro posts are useful outside the context of HN.
For example on retro computing boards it makes me so happy when someone bumps a 5 year old thread to share new details, benchmarks, etc. about some card or motherboard where the ancient thread is first thing that appears in search results.
That said, I run old fashioned forums and some older threads get revived there from time to time with new insights. Others get flagged up by copyright holders under DMCA takedown threats or bumped by spambots though.