it’s worth mentioning mine is over 10 years old and was that cheap when I bought it. If you can find a fanless design, these will last ages since there’s a few simple non-moving components that do the same kind of work all day every day and don’t take a ton of abuse. Even after all these years, the CPU on mine sits mostly idle even with heavy traffic. Modern software is just very efficient.

Another reason the router/firewall lasts is because I use a dedicated WiFi antenna. This is another part that gets the same work every day. I’ve upgraded mine twice, but it was almost double the speed each time, and I didn’t have to spend extra money on routing hardware that was still plenty powerful.