Yeah, my site which is hosted on fly.io's smallest VM with 256MB RAM and only part of a CPU core was on the HN front page the other day and I was surprised to see that it barely even registered the resource usage: consuming just 50MB RAM with a 0.2 load average.
It is a fairly simple webpage, and it's rendered in Rust so it's probably more efficient than most. And perhaps it didn't get as much traffic as other things on the front page, but I was still expecting worse given how much some sites seem to struggle.