[taosx]

I believe it's really useful that sometimes things resurface on HN after a while.

1. Exposure of techniques, tools to people that are new to the field, or now the context is right.

2. People with experience share their insights and opinions (TIL: Igraph an/cugraph)

[tudorw]

I'd add to that, the comments are fresh on resurfaced article, so if there is a new competitor or alternative it get's mentioned.