If Threshold does what that article suggests we think is likely, yes it is.
What it's useful for is doing things how I want to do them, because I've been doing it for a very long time, and see NO need to do them a completely different way unless I (not MS) get a considerable benefit from doing it.
What MUI boils down to, for me, is having to pay MS for the hassle of upgrading to use something I neither want, nor need.
If MS want to force MUI on us, fine. I quit using Windows. Not a problem.
If they want to retain people like me, and our upgrade fees for Windows and other packages, including Office, they WILL give in on this.
And I no longer much care either way, by the way.