At least a decade. I’ve never been there and joined early in my career when I was told by mentors that it was a good source of up to date news on technology and the industry
I think the implication with that phrasing is that HN is more left-leaning (like Silicon Valley), which traditionally isn't into "prepping", so this "pro-prepping" article is an interesting anomaly, perhaps even a harbinger.
This is incorrect. Left-leaning preppers grow food and medicinal plants in their garden, install solar panels, and get vaccines, rather than stock up on guns and ammo.
The participating commenter base on this site has been much wider than could be described that way for many years.