lol. I purchased several with the express intent to not upgrade.
Same here, actually a number of my clients XP legacy apps have 16 bit installers, ergo no go Win 7 natively. These apps are installed in XPvirt boxes under Windows 7. I have no idea if Win 10 pro will support XPvirt boxes or if support for them will shortly disappear thereafter in some sort of forced update..
My advice to any business owner, would be to avoid this latest Win 10 release like the plague, they still don't have a stable build and it's less than 1 month before product release. I feel that using Win 10 is a high risk proposition at best, let someone else be the guinea pig.