Having used windows 10 since windows 3 I disagree with your disagreement.
Windows is windows - but AS a tablet it is nowhere near the usability of droid or iOS.
OK. I understand the assertion you are making.
I simply disagree with it. Strongly.
And “usability” is a very difficult thing to define. Most folks who today moan about “usability” would be utterly baffled by the first computer I used ... and accomplished real, useful work with.