The people at Virtualbox also warn you against using the binaries from distributions, but to get them from their own site.
This said, I have been playing with it in recent days, mainly to get MS Windows without dual-boot; installed XP, 7, and updated to 10 no problem (need Windows for a couple progs to connect to some esoteric GPS, cameras and phones).
I also installed PCLinuxOS, to check it has and does all what I need, so I will know if I can rely on it on the day when I decide to leave Debian rather than abandon Gnu-Linux and shift to Systemd-Linux.
Cheers,
Ron.