OK, not the biological age, but the "computer" age.

Nongeeky people just want to push a button and expect an app to work, without giving a second thought to parallels, perpendiculars, etc. Plus, as I said before, virtualization costs money. Not all people have a retail copy of Windows lying around (OEM versions can not be legally transferred from one computer to another), plus the perpendiculars program costs some money. Sure, the setup will work, but why bother? Just buy a $199 no-brand desktop on sale and use it to run the needed Windows software. Cheap and no need to relearn anything.
Macs are better in many respects, but running proprietary Windows software is not one of them. You can do it on a Mac, but it requires extra software = extra money.