You’re currently reading this on a forum that’s been engineered with the same seriousness usually reserved for running, oh, I don’t know, the internet itself.
Most community sites run on a single box in someone’s basement, crossed fingers, and maybe a cat sitting on the router. This one? Nope. We went all in. Here’s the setup, in plain English:
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Web Servers: A fleet of Debian boxes. Not one, not two, but enough that if half of Ohio logs in at once, it will be fine.
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Databases: A PostgreSQL cluster so resilient it makes cockroaches jealous.
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Caching: A dedicated Redis cluster, because why fetch something once when you can fetch it faster than déjà vu?
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Storage: A Synology NAS that’s basically a black hole for data. Unlimited space. Replicated. Your memes are safe forever.
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Load Balancing: HAProxy carefully juggling traffic like a caffeinated circus performer.
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Firewalls: Redundant, automatic failover beasts. Hackers can try, but it is like bringing a squirt gun to fight a battleship.
So yes, technically this forum could probably host all of Ohio. Maybe the entire U.S. Just do not all post cat pictures at once, please. 
Welcome aboard. Enjoy, poke around, and remember: behind the scenes, an absurdly overbuilt machine is humming along just to make sure you can hit “Like” on your neighbor’s comment.