Why? It is free and robust. You can manage hundreds of VMs without paying a licensing fee. The trade-off is that selling these VMs to the public requires extra setup work to connect it to a billing system.
(Best All-in-One Open Source Alternative) virtualizor alternative
These are heavy hitters used by corporations. They are rarely used for "budget VPS hosting" due to cost and complexity. and networking experience for internal infrastructure.
Enterprises and tech-savvy administrators seeking high performance and no license fees. virtualizor alternative
Cobbler is a Linux installation server that allows for rapid setup of new systems.
If you have no need for billing integration, Virtualizor is overkill. Proxmox offers a superior snapshotting, backup, and networking experience for internal infrastructure.