Is it possible to scale VPS resources easily when using Virtualmin?

Yeah, that’s actually one of the strong points of flexible VPS resources when paired with Virtualmin. Since Virtualmin runs on top of a standard VPS, you’re not locked into a fixed setup — you can easily upgrade CPU, RAM, or storage whenever your project grows.
It works especially well with KVM-based servers because resources are isolated, so scaling up doesn’t break your configuration. You can start small for testing or low-traffic sites and then smoothly expand without reinstalling everything or changing your panel setup.

That's a solid point. I’ve found that Virtualmin handles those hardware upgrades quite gracefully. Most cloud providers allow a reboot to recognize the new RAM/CPU, and Virtualmin's dashboard updates the status almost instantly.

Exactly, but don't forget to manually resize the filesystem if you're scaling storage! Virtualmin shows the new disk space, but you usually need to run a quick command like resize2fs to actually use it on the partition level.