Server 2016 was released in September 2016. If Spectrum doesn't support it yet, when?
Also, do you guys support hybrid windows environment in a Distributed Spectrum environment? Example- One landscape running on windows 2008 and other landscape on windows 2016?
I hope hybrid windows environment is supported .
You can mix and match operating systems in Spectrum, so yes. As far as 2016 support, I don't believe it's supported yet but stay tuned for a release later this year.
Here's the compatibility matrix.
System Requirements for Windows - CA Spectrum - 10.2 to 10.2.3 - CA Technologies Documentation
Installation of Spectrum on Windows 2016 is scheduled to be included in Spectrum 10.03.00.