I can only speak from my experience.

I loaded Windows 10 onto my laptop this morning. It went smoothly and loaded up okay.

All of my Xara stuff, including my Designer ProX 11 trial all work smoothly. I'm sure some items and drivers etc on other people's laptops etc may have problems but mine was a smooth as chocolate.

On a site note I have just had two people get back to me, virtually at the same time today, to ask me to do a lot of graphic work for them.

So although one poster on this forum thinks that if we use Xara and haven't got a Phd in graphic design we are con-men and amateurs, I will be purchasing this upgrade so I can carry on doing awful, dishonest and amateurish work.

Oh and I still do free work for the NHS to...I'm practically evil.