I use 4K screens. Virtualbox is literally unusable at those resolutions. I have to run VMs at 1080p and upscale them in Virtualbox. At 4k, simple actions such a

I use 4K screens. Virtualbox is literally unusable at those resolutions. I have to run VMs at 1080p and upscale them in Virtualbox. At 4k, simple actions such as opening the start menu take several seconds. VMWare does this much better, but is a pain to run on up-to-date kernels. The situation sucks, is what I'm saying.