its a bad idea in general to use non-1.0 temperature. there is a reason labs are strongly recommending using 1.0.
using low temperature is more deterministic, but the cost is the model becomes "dumber"
It can be useful for pure translation tasks and stuff like that where you explicitly don't want creativity of any kind.
Plenty of setups defaults to lower values than 1.0.
1.0 is actually pretty arbitrary and way too high as a general rule. Something like 0.3 is a more sensible default