I've seen it used before commercial security/networking appliances got "good" (generally pre-2010ish), but I think its use has diminished. I was a huge OpenBSD

I've seen it used before commercial security/networking appliances got "good" (generally pre-2010ish), but I think its use has diminished. I was a huge OpenBSD user back then as the networking (routing/firewalling/etc) was so simple AND powerful. I stopped when screenOS and later Juniper matured to the point where updates were just uploading firmware and hardware upgrades were just dumping the old configs in. I knew it was deployed at a few non-tech oriented fortune 500 companies (eg not banks or tech firms) as last as 2016, but I've been out of that market since.