I used VirtualBox on Linux to host my Home Assistant server for a while. I kept having odd issues with usb devices. I'd have to disconnect and reconnect them to get them working again.

Many people in the HA help groups say not to use VirtualBox, and at first I thought they were basing that on old info. But then I started having issues, too. On the other hand, kvm has been rock solid for a long time.

So I'm glad to see they continue to develop it, but I wouldn't recommend it for heavy duty use. It's useful to dipping toes into virtualization, or maybe for running systems for the short term (a few hours here and there, or something), but for long term use, I'd go another route. It's certainly easier to set up the network in VirtualBox, I'll grant that - it took me a while to get it right for HA on kvm. (Of course, that's a one-time setup thing, too - I shouldn't have to touch it again. And don't ask me what I did, because I don't remember!)

virtmanager and boxes for qemu/kvm have freed me from the accursed Oracle product and it's dkms modules

I've been too lazy to rebuild my windows work VM in something different and never really had any issues with VirtualBox. I know there are better solutions out there I just can't be stuffed.

Remember : using virtualbox at work is not free

I keep forgetting that Virtual Box exists because Hyper-V has been available since Win7 and nix has qemu or KVM for native virtualisation.