Re: What is the purpose of running duel boot!
I personally haven't used dual boot in years, I prefer VMs. I have multiple VMs on my machines, I have VMs of XP, Vista, Win 2000, Win ME, Win 7, Win 8.1, Win 10, Win 98, Win 95, WFW 3.11, Dos 6.22 as well as quite a few different Linux distros. I like to keep VMs of different OSes so that if someone asks a question about one of them, I can fire it up and take a look.
An advantage of VMs over dual boot is that with dual boot you can only run 1 OS at a time, at boot time you need to decide which OS you wish to boot and then boot it. With VMs, I can have several OSes booted and running simultaneously (provided there's sufficient RAM). I can shut down one OS and bring up another with ease, all without needing to reboot the computer the VMs are running on.
The disadvantage to a VM is performance, an OS running in a VM doesn't get the full benefit of the cpu, memory or video of the host machine. For instance VMs don't work well for gaming.