I am considering purchasing the desktop computer that fits my requirements, except it comes with Windows 10 Home while I need the Pro edition. Is an upgrade of the OEM version after purchase offered by Microsoft, and, if indeed possible, how much does it currently cost, roughly, in the US--is it significantly less expensive than the new OS license, which is $200?
I read the Microsoft's Windows 10 Upgrade page, but I cannot make sense of it. The closest statement that seems to apply is
If you don't have a digital license for Windows 10 Pro, Windows 10 Pro is available for purchase from the Microsoft Store.
which possibly implies that there is no upgrade option whatsoever (and the FAQ makes no distinction between retail and OEM). But this is possibly contradicted by my finding posts from people succeeding through quite complex upgrade paths. All in all, I am lost and confused.