My VPS provider is running a promotion where I can get up to 5 additional public IPv4 addresses for a one-time cost of $25 each. I have always only used a single public IP address per VPS. Would there be any advantage of having additional public IP addresses?
I know some people do not consider a VPS self-hosting, but this is the most relevant community I could think of and the question is also applicable for homelabs as well.
You can route traffic in different ways, for a high traffic endpoint hook an IP straight into nginx, while regular to via virtual opnSense router, that adds overhead but more flexible routing. Got PVE with virtual networking inside.