I used to run a cs1.6 server on an amd 800mhz with 256mb of ram in the 2000s. I'm looking these days to get a mac mini and while thinking that 16gb will not be enough I remembered about that server. It was a NAT gateway too, had a webserver also with hitstats for the cs server. And it was a popular 16v16 type of server too. What happened? How did we get to 16gb minimum and 32gb will make you not sad.
i ran my whole house network off a laptop with the specs of a raspberry pi 2 for a really long time. I finally broke and moved it to a VM because the laptop's built in port and USB were finally too slow to route traffic, 11mbit USB! It took a decade+[1] of "innovation" in the US before i could finally buy internet faster than 11mbit. IIRC i switched to VM based IPCop in ~2007.
[1] My first broadband connection was in 1998 at 768/768 kbit symmetrical. My first megabit speed connection was in 2006 or 2007. in 2010 or 2011 we got VDSL and it was 16 whole megabits. Now i have 300mbit on a good day, and 150mbit on a bad day.
I literally wrote the guide on how to use old hardware with VM tech to route your house, first with ipcop[2], then generically[3], and just this week i wrote a guide on how to get ipv6 working with starlink and dd-wrt[4].
ETA: it is hilarious how much pushback i got about doing all of this in a VM, just scant years before "you should just use a VM for that" became the default answer, and a decade before "just put it in a k8s cluster and pay someone a quarter million a year to babysit it" became a thing...
also ipcop booted and installed off a single floppy forever