There's Windows 10, and there's Windows 10 IoT
"I wouldn't mind being able to throw a Win10 SD card into a Pi3. I'm sure there will be "windows only" things that my kids come home from school with, so having an easy "pop this SD card in, machine will connect to the dirty network, do windows stuff" would be useful."
Last time I looked, the relationship between Win10 (on real PCs) and Win10 IoT (on embedded devices) was similar to that between Windows NT (on real PCs) and Windows CE (on embedded devices).
IE the two flavours of Windows have almost nothing in common except the name and the hype. They don't have the same applications (except in name) and even the data formats may be incompatible without conversion (oh Activesync, how we loved you. Not.).
Has something changed while I've not been looking, or do people still not understand this distinction?
Does Linux have this problem? I think not.