@metaphil This is what I was waiting for, this is the only correct and acceptable answer! 
@kubikpixel Because I still have an XP image from the ancient times I don't wanna loose. (For some reasons.)
And the second one is, that I'm too lazy to migrate.
(I hope it is possible?)
..
I remember a third one: My last laptop did nit support qemu, because if the lack of some processor features. On the "new" one I did not test it. (See 'second' reason.)
@kubikpixel I don't use it at all anymore, but I'm a Big Nerd. I wish projects like Gnome Boxes would get more love, IMO that's the kind of seamless UI people want for wider scale adoption.
@kubikpixel
❎ Yes!