Oddly, story did not contain a link to it... here it is: https://www.qemu-advent-calendar.org/2020/
Open source type 2 hypervisor QEMU has brought back its advent calendar. The project offers daily festive downloads of a new disk image for you to run under QEMU, with a new image made available every day from December 1st to the 24th. The calendar previously appeared in 2018, 2016 and 2014, and typically features disk images …
I think QEMU exceeds VirtualBox in pretty much every way these days, for example VirtualBox can't do PCI-E passthrough. I run windows in a VM with a geforce gtx1070 passed through so I play games and run linux as my main desktop without having to worry about terrible nvidia linux drivers or games not working on wine or having to reboot my system.
I need to give QEMU a try. I use VirtualBox (carefully kept free of the Extensions with their "Oracle now owns your soul" license) occasionally when I want a VM locally rather than just using one of the many on our network, and it does the job, but it never hurts to give alternatives a spin. This advent calendar and the seasonal time off might be my excuse. (Though any time off is typically preempted by my granddaughters, whose requirements expand to fit available resources. It's the Mythical Grandmonth.)
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