@Porthos: That earlier post had somehow slipped my mind. And given the title in post #44, I thought this had to do with getting Windows 11 itself to install on systems lacking one of the "essential" hardware features it looks for.
I was not sure whether something different/additional might be needed with regard to the Feature Updates.
@nlinecomputers: Well, there is some subtle difference between how Rufus handles this, when it's the only thing, and the registry hack, even when used with a Rufus-icated installer. The first "incompatible" machine I did a Windows 11 upgrade (not clean install) on did not present me with any warning at all (see
post #16) while the machine on which I had done the registry hack, but used the same install media, did present the Microsoft warning.