I am a long-time user of virtualisation solutions. I have been doing it for over 12 years by this point, and I've seen alot of different solutions come and go over the years. All that they had in common, was, that they took up space and memory. Usually, you had to calculate double the memory that was used inside the guest os for one machine.
I have been doing IT “things” for roughly the past 27 years. Within that timeframe, I came across the Open Source “Movement” around 1998. What caught my attention with opensource immediately, was the fact, that I could interact with those projects. I made not needed money (which I did not have as a schoolkid and a student) and I did not need much education in the field.
About two years ago I was putting together my bags and my laptop, leaving for another place for a few months, I did not knew much about that place, only that it had cable tv. Of course I wanted to be able to watch some tv, with as little of hurdle as possible, so I grabbed myself a dvb-c tv usb stick for my laptop.
I have been running my projects on openvz for about the past 10 years, I like it because it is stable and simple to handle. Meanwhile on my workstation I have been using libvirt in combination with kvm and qemu for about the same time to test operating systems and network setups as well as coding for certain environments.