I'm pretty sure ambient temperature, at ground level at least, has been modeled for a long time.
The fact they produced a v4.11 "read me" showing map temps doesn't mean they were not present long before v4.11
Desert maps ambient temps were @ 80-90' back on v4.07 iirc
You only had to look at the temp gauge on your aircraft with the engine off on the runway to see ambient temperature was in the map.
Which was always a bit strange as the engine was cold but the temp gauge registered outside temp.
Air density at altitude is the interesting factor though it seems something had changed.
A word form TD would be enlightening.
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