when might we see resolution?
I doubt that you will... what's hold you back from using Windows Server 2008 or 2012R2?
You also mention:
learning about creating an app with it.
FileMaker Server is the hosting software, but if you are looking to build the Database/Solution itself you would want to check out FileMaker Pro 15, which will install on Windows 10.
There is no going back, FMS 15 is not certified for Windows 7, 8, 8.1. Only server versions of Windows.