Proxmox absolutely changed the game for me learning Linux. Spinning up LXC containers in seconds to test out applications or simply to learn different Linux OSs without worrying about the install process each time has probably saved me days of my life at this point. Plus being able to use and learn ZFS natively is really cool.
My website/blog is in the cloud but anything that needs local storage or internet access (everything else) is virtualized in a container on proxmox.