Re: Cloudy environments only?
It won't be open source.
"Or is it a proprietary software that requires internet access to phone home as per Windows 10, 8.1, 8.0 and 7.?."
Given that to "phone home" like those, they'd have to mandate phoning home, or indeed require internet access, no.
None of those OSes require internet access at all, not even to activate them.