VestaCP is a powerful and simple control panel. It runs fast on any decent VPS (I recommend Linode). But sometimes you outgrow your current space and want to move individual sites to new servers. Being proactive in this will save you time and headache in the future (as I’ve learned from personal experience).
Why? Because when you setup a new server, you can migrate the individual user/domain to the new server without having to muck up your admin account and remove accounts that unintentionally migrated.
VestaCP has their own migration guide here, so there’s no need for me to go into any detail about restoring that user.