Remember the 90s when you could do that, at least the smaller shops used to have some Linux CDs. What happened, why is none seemingly interested in selling it? What i mean, the smaller hw shops that are still around could sell NVMe disks preloaded with Linux distros, they could also sell enclosures so that users would be able to run it via usb 3 as a portable operating system. Let's face it, dual booting is dead, for those with interest in Linux but who can't escape the Windows trap maybe could run it on portable storage.