That paragraph isn’t about it on a VM, it’s about your idea of them keeping all the OSes available for download for a fee. That has the OSes running straight up, which means they’ve got to be supported and patched and everything else.
If it wouldn’t be profitable there’s no reason to do it. MS is a business, they exist to make money, period. Customers that have very expensive hardware that can’t run the new OSes have had a long time to figure hoard equipment and copies of XP to keep that setup going. Nobody is forcing them to uninstall XP, they’re just not making patches for it anymore. If they want to be on new computers then they need to get with the OEMs and figure out why they can’t run the new OSes and fix it.
Read the last four words......they are "in a virtual machine".
What I posted said zip about keeping the full/original OS's, it was completely about versions designed to run specifically in a VM. It could be that the "old OS" would ONLY run in a very specific VM, tailored for that purpose.