Hi,
Cyberpanel's default values for "Max Connections: 20000" and "Max SSL Connections: 10000".
Just try to spin a new Vultr HF droplet which has 2vCPU (3.7Ghz) and 4GB Ram, Los Angeles location and it can hold up to 2000 clients per sec test. More than that, OLS crashed.
But a good thing...