Re: What's this Silverlight thing?
On a related note, I've recently had to deal with people sending me proofs of payment... as XPS files. Which would be fine except none of the Windows 10 apps can read the damn things anymore.
Whoever decided that deprecated apps (Reader) are going to be unable to work at all ("Reader is no longer supported. Go screw yourself."), rather than just no longer updated needs shooting with something very pointy.
I have to send them to our one remaining W7 machine to convert them to PDF.